haha, i beat it! really cool puzzle design going on here :)
and it's neat how the game teaches you all the mechanics without much hand-holding; the "tutorial" part actually triggers that bit in your brain that goes "a-ha!" and makes you feel good
i have a sneaking suspicion that i kind of cheesed the last level - after a couple of attempts getting nowhere, i just kind of awkwardly shimmied into the large tower from the lowest level via the "green"-style, uh, shooty thingy, and then everything exploded. don't know if that's the intended method lol
also, cool engine choice! ;D