diff --git a/Global/InGameState.gd b/Global/InGameState.gd
new file mode 100644
index 0000000..d0cf413
--- /dev/null
+++ b/Global/InGameState.gd
@@ -0,0 +1,31 @@
+extends Node
+
+
+var max_health = 100.0
+var player_healths = []
+var player_count: int
+
+signal player_win(player_id)
+signal player_count_updated(new_player_count)
+
+
+func set_player_count(new_player_count: int):
+	assert(new_player_count <= 4)
+	
+	player_count = new_player_count
+	player_healths = []
+	
+	for i in range(0, player_count):
+		player_healths.append(max_health)
+	
+	emit_signal("player_count_updated", new_player_count)
+
+
+func subtract_player_health(player_id, subtractor):
+	assert(player_id < player_count)
+	assert(player_id >= 0)
+	
+	player_healths[player_id] -= subtractor
+	
+	if player_healths[player_id] < 0.0:
+		emit_signal("player_win", player_id)
diff --git a/UI/UI.tscn b/UI/UI.tscn
new file mode 100644
index 0000000..5a3e938
--- /dev/null
+++ b/UI/UI.tscn
@@ -0,0 +1,75 @@
+[gd_scene format=2]
+
+[node name="UI" type="Control"]
+anchor_right = 1.0
+anchor_bottom = 1.0
+__meta__ = {
+"_edit_use_anchors_": false
+}
+
+[node name="MarginContainer" type="MarginContainer" parent="."]
+anchor_right = 1.0
+anchor_bottom = 1.0
+margin_left = 20.0
+margin_top = 20.0
+margin_right = -20.0
+margin_bottom = -20.0
+__meta__ = {
+"_edit_use_anchors_": false
+}
+
+[node name="PlayerHealthController" type="Control" parent="MarginContainer"]
+margin_right = 984.0
+margin_bottom = 560.0
+
+[node name="VSplitContainer" type="VSplitContainer" parent="MarginContainer/PlayerHealthController"]
+margin_right = 984.0
+margin_bottom = 560.0
+split_offset = 902
+dragger_visibility = 2
+__meta__ = {
+"_edit_use_anchors_": false
+}
+
+[node name="HSplitContainer" type="HSplitContainer" parent="MarginContainer/PlayerHealthController/VSplitContainer"]
+margin_right = 984.0
+margin_bottom = 546.0
+split_offset = 492
+dragger_visibility = 1
+
+[node name="Player1Health" type="ProgressBar" parent="MarginContainer/PlayerHealthController/VSplitContainer/HSplitContainer"]
+margin_right = 496.0
+margin_bottom = 14.0
+__meta__ = {
+"_edit_use_anchors_": false
+}
+
+[node name="Player2Health" type="ProgressBar" parent="MarginContainer/PlayerHealthController/VSplitContainer/HSplitContainer"]
+margin_left = 508.0
+margin_right = 984.0
+margin_bottom = 14.0
+__meta__ = {
+"_edit_use_anchors_": false
+}
+
+[node name="HSplitContainer2" type="HSplitContainer" parent="MarginContainer/PlayerHealthController/VSplitContainer"]
+margin_top = 546.0
+margin_right = 984.0
+margin_bottom = 560.0
+split_offset = 492
+dragger_visibility = 1
+
+[node name="Player3Health" type="ProgressBar" parent="MarginContainer/PlayerHealthController/VSplitContainer/HSplitContainer2"]
+margin_right = 496.0
+margin_bottom = 14.0
+__meta__ = {
+"_edit_use_anchors_": false
+}
+
+[node name="Player4Health" type="ProgressBar" parent="MarginContainer/PlayerHealthController/VSplitContainer/HSplitContainer2"]
+margin_left = 508.0
+margin_right = 984.0
+margin_bottom = 14.0
+__meta__ = {
+"_edit_use_anchors_": false
+}