add ice towers - no projectiles, no button

game/enemy.odin

@@ -1,6 +1,7 @@
 package game
 
 import "core:fmt"
+import "core:sys/posix"
 import rl "vendor:raylib"
 
 Enemy :: struct {
@@ -9,7 +10,8 @@ Enemy :: struct {
 	max_health: int,
 	active:     bool,
 	path_index: int,
-	speed:      f32,
+	base_speed: f32,
+	slow_timer: f32,
 }
 
 acquire_enemy :: proc(world: ^World) -> ^Enemy {
@@ -33,7 +35,8 @@ spawn_enemy :: proc(world: ^World, health: int, speed: f32) {
 		position   = world.path[0],
 		health     = health,
 		max_health = health,
-		speed      = speed,
+		base_speed = speed,
+		slow_timer = 0,
 		path_index = 1,
 		active     = true,
 	}
@@ -59,7 +62,12 @@ update_enemies :: proc(world: ^World, dt: f32) {
 		}
 
 		target := world.path[e.path_index]
-		move_toward(&e.position, target, e.speed, dt)
+		move_speed := e.base_speed
+		if e.slow_timer > 0 {
+			move_speed *= ICE_SLOW_FACTOR
+			e.slow_timer -= dt
+		}
+		move_toward(&e.position, target, move_speed, dt)
 
 		dx := target.x - e.position.x
 		dy := target.y - e.position.y
@@ -83,6 +91,9 @@ render_enemies :: proc(world: ^World) {
 		e := world.enemies[i]
 		if !e.active do continue
 		rl.DrawCircle(i32(e.position.x), i32(e.position.y), 11, rl.MAROON)
+		if e.slow_timer > 0 {
+			rl.DrawCircleLines(i32(e.position.x), i32(e.position.y), 14, rl.SKYBLUE)
+		}
 		rl.DrawText(
 			fmt.ctprintf("%d", e.health),
 			i32(e.position.x) - 4,