Heck yeah, you punch those trees, Gary!

terrain/dirt.png.import

@@ -0,0 +1,34 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://c5lr861cmya6r"
+path="res://.godot/imported/dirt.png-4b2e3b8f4083fb0baf8bb6a15680a151.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://terrain/dirt.png"
+dest_files=["res://.godot/imported/dirt.png-4b2e3b8f4083fb0baf8bb6a15680a151.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

terrain/grass.png.import

@@ -0,0 +1,34 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://bavfwcsgof0tp"
+path="res://.godot/imported/grass.png-a4e0c50e89c55d70401dc2d88d40db84.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://terrain/grass.png"
+dest_files=["res://.godot/imported/grass.png-a4e0c50e89c55d70401dc2d88d40db84.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

terrain/terrain.gd

@@ -0,0 +1,9 @@
+extends TileMapLayer
+
+var dirt_id = 0
+var grass_id = 1
+
+func _unhandled_input(event: InputEvent) -> void:
+	if event is InputEventMouseButton and event.button_index == MOUSE_BUTTON_LEFT and event.is_pressed():
+		var coords: Vector2i = local_to_map(event.position)
+		set_cell(coords, dirt_id, Vector2i.ZERO, 0)

terrain/terrain.gd.uid

@@ -0,0 +1 @@
+uid://cmgxx7uxo2ah0

terrain/terrain_tileset.tres

@@ -0,0 +1,19 @@
+[gd_resource type="TileSet" load_steps=5 format=3 uid="uid://resk8tvqugsx"]
+
+[ext_resource type="Texture2D" uid="uid://c5lr861cmya6r" path="res://terrain/dirt.png" id="1_m2li2"]
+[ext_resource type="Texture2D" uid="uid://bavfwcsgof0tp" path="res://terrain/grass.png" id="2_54oqm"]
+
+[sub_resource type="TileSetAtlasSource" id="TileSetAtlasSource_busfd"]
+texture = ExtResource("1_m2li2")
+texture_region_size = Vector2i(32, 32)
+0:0/0 = 0
+
+[sub_resource type="TileSetAtlasSource" id="TileSetAtlasSource_wkw05"]
+texture = ExtResource("2_54oqm")
+texture_region_size = Vector2i(32, 32)
+0:0/0 = 0
+
+[resource]
+tile_size = Vector2i(32, 32)
+sources/0 = SubResource("TileSetAtlasSource_busfd")
+sources/1 = SubResource("TileSetAtlasSource_wkw05")