Super cute game! Really well made. Discovering the x2 upgrades was super intriguing. Seems that using them on drones is the intended path. Really wanted more kinds of upgrades.
Actually didn't want to finish it, but after 40 minutes and everything unlocked there's little to do. The last interesting thing was the bullet prism.
Either way, 1-2 more zones would be great, but the game is perfect as it is. Great work!