diff --git a/src/net/torvald/terrarum/UIItemInventoryElem.kt b/src/net/torvald/terrarum/UIItemInventoryElem.kt
index 1123272db..ff02a7dcb 100644
--- a/src/net/torvald/terrarum/UIItemInventoryElem.kt
+++ b/src/net/torvald/terrarum/UIItemInventoryElem.kt
@@ -10,6 +10,7 @@ import net.torvald.terrarum.gameitem.GameItem
 import net.torvald.terrarum.itemproperties.ItemCodex
 import net.torvald.terrarum.modulebasegame.TerrarumIngame
 import net.torvald.terrarum.modulebasegame.ui.UIInventoryFull
+import net.torvald.terrarum.modulebasegame.ui.UIInventoryFull.Companion.INVEN_DEBUG_MODE
 import net.torvald.terrarum.modulebasegame.ui.UIItemInventoryCellBase
 import net.torvald.terrarum.modulebasegame.ui.UIItemInventoryCellCommonRes
 import net.torvald.terrarum.modulebasegame.ui.UIItemInventoryCellCommonRes.toItemCountText
@@ -105,7 +106,7 @@ class UIItemInventoryElem(
             // this one-liner sets color
             batch.color = item!!.nameColour mul if (mouseUp) mouseOverTextCol else inactiveTextCol
             // draw name of the item
-            if (AppLoader.IS_DEVELOPMENT_BUILD) {
+            if (INVEN_DEBUG_MODE) {
                 AppLoader.fontGame.draw(batch,
                         // print static id, dynamic id, and count
                         "${item!!.originalID}/${item!!.dynamicID}" + (if (amount > 0 && item!!.stackable) "$fwsp($amountString)" else if (amount != 1) "$fwsp!!$amountString!!" else ""),
diff --git a/src/net/torvald/terrarum/modulebasegame/ui/UIInventoryCells.kt b/src/net/torvald/terrarum/modulebasegame/ui/UIInventoryCells.kt
index dfb5695c0..779bcc3fb 100644
--- a/src/net/torvald/terrarum/modulebasegame/ui/UIInventoryCells.kt
+++ b/src/net/torvald/terrarum/modulebasegame/ui/UIInventoryCells.kt
@@ -7,6 +7,7 @@ import net.torvald.terrarum.*
 import net.torvald.terrarum.gameactors.ActorWithBody
 import net.torvald.terrarum.langpack.Lang
 import net.torvald.terrarum.modulebasegame.gameactors.ActorInventory
+import net.torvald.terrarum.modulebasegame.ui.UIInventoryFull.Companion.INVEN_DEBUG_MODE
 import net.torvald.terrarum.ui.UICanvas
 import kotlin.math.roundToInt
 
@@ -122,7 +123,7 @@ internal class UIInventoryCells(
         )
         // debug text
         batch.color = Color.LIGHT_GRAY
-        if (AppLoader.IS_DEVELOPMENT_BUILD) {
+        if (INVEN_DEBUG_MODE) {
             AppLoader.fontSmallNumbers.draw(batch,
                     "${full.actor.inventory.capacity}/${full.actor.inventory.maxCapacity}",
                     encumbBarTextXPos,
diff --git a/src/net/torvald/terrarum/modulebasegame/ui/UIInventoryFull.kt b/src/net/torvald/terrarum/modulebasegame/ui/UIInventoryFull.kt
index 2924f0739..5f466be27 100644
--- a/src/net/torvald/terrarum/modulebasegame/ui/UIInventoryFull.kt
+++ b/src/net/torvald/terrarum/modulebasegame/ui/UIInventoryFull.kt
@@ -33,10 +33,10 @@ class UIInventoryFull(
     override var height: Int = AppLoader.screenH
     override var openCloseTime: Second = 0.0f
 
-    val REQUIRED_MARGIN = 166 // hard-coded value. Don't know the details
+    val REQUIRED_MARGIN: Int = 138 // hard-coded value. Don't know the details. Range: [91-146]. I chose MAX-8 because cell gap is 8
 
     val CELLS_HOR = 10
-    val CELLS_VRT = (AppLoader.screenH - REQUIRED_MARGIN - 134 + UIItemInventoryDynamicList.listGap) / // 134 is another magic number
+    val CELLS_VRT: Int; get() = (AppLoader.screenH - REQUIRED_MARGIN - 134 + UIItemInventoryDynamicList.listGap) / // 134 is another magic number
                             (UIItemInventoryElemSimple.height + UIItemInventoryDynamicList.listGap)
 
     private val itemListToEquipViewGap = UIItemInventoryDynamicList.listGap // used to be 24; figured out that the extra gap does nothig
@@ -46,9 +46,9 @@ class UIInventoryFull(
 
     val itemListHeight: Int = CELLS_VRT * UIItemInventoryElemSimple.height + (CELLS_VRT - 1) * net.torvald.terrarum.modulebasegame.ui.UIItemInventoryDynamicList.Companion.listGap
 
-    val INVENTORY_CELLS_UI_HEIGHT = CELLS_VRT * UIItemInventoryElemSimple.height + (CELLS_VRT - 1) * UIItemInventoryDynamicList.listGap
+    val INVENTORY_CELLS_UI_HEIGHT: Int = CELLS_VRT * UIItemInventoryElemSimple.height + (CELLS_VRT - 1) * UIItemInventoryDynamicList.listGap
     val INVENTORY_CELLS_OFFSET_X = 0 + (AppLoader.screenW - internalWidth) / 2
-    val INVENTORY_CELLS_OFFSET_Y = 107 + (AppLoader.screenH - internalHeight) / 2
+    val INVENTORY_CELLS_OFFSET_Y: Int = 107 + (AppLoader.screenH - internalHeight) / 2
 
     init {
         handler.allowESCtoClose = true
@@ -253,5 +253,9 @@ class UIInventoryFull(
         xEnd = (AppLoader.screenW + internalWidth).div(2).toFloat()
         yEnd = (AppLoader.screenH + internalHeight).div(2).toFloat()
     }
+
+    companion object {
+        const val INVEN_DEBUG_MODE = false
+    }
 }
 
diff --git a/src/net/torvald/terrarum/modulebasegame/ui/UIItemInventoryDynamicList.kt b/src/net/torvald/terrarum/modulebasegame/ui/UIItemInventoryDynamicList.kt
index 8fd79b455..40b2a73f3 100644
--- a/src/net/torvald/terrarum/modulebasegame/ui/UIItemInventoryDynamicList.kt
+++ b/src/net/torvald/terrarum/modulebasegame/ui/UIItemInventoryDynamicList.kt
@@ -11,6 +11,7 @@ import net.torvald.terrarum.modulebasegame.gameactors.ActorInventory
 import net.torvald.terrarum.modulebasegame.gameactors.InventoryPair
 import net.torvald.terrarum.modulebasegame.ui.ItemSlotImageFactory.CELLCOLOUR_BLACK
 import net.torvald.terrarum.modulebasegame.ui.ItemSlotImageFactory.CELLCOLOUR_BLACK_ACTIVE
+import net.torvald.terrarum.modulebasegame.ui.UIInventoryFull.Companion.INVEN_DEBUG_MODE
 import net.torvald.terrarum.ui.UIItem
 import net.torvald.terrarum.ui.UIItemImageButton
 import net.torvald.terrarum.ui.UIItemTextButton.Companion.defaultActiveCol
@@ -309,7 +310,7 @@ class UIItemInventoryDynamicList(
             // set tooltip accordingly
             if (isCompactMode && it.item != null && it.mouseUp && !tooltipSet) {
                 (Terrarum.ingame as? TerrarumIngame)?.setTooltipMessage(
-                        if (AppLoader.IS_DEVELOPMENT_BUILD) {
+                        if (INVEN_DEBUG_MODE) {
                             it.item?.name + "/Mat: ${it.item?.material?.identifier}"
                         }
                         else {
diff --git a/work_files/.directory b/work_files/.directory
deleted file mode 100644
index edfa63231..000000000
--- a/work_files/.directory
+++ /dev/null
@@ -1,9 +0,0 @@
-[Dolphin]
-SortRole=type
-Timestamp=2020,2,22,4,4,10
-Version=4
-ViewMode=1
-VisibleRoles=Details_text,Details_size,Details_modificationtime,Details_type,CustomizedDetails
-
-[Settings]
-HiddenFilesShown=true