Ah, glad you liked it!
Yeah, other than art which I just find hard to do on acceptable level, it was second hardest part for this entry, to figure out how the difficulty level should work. As it's jam game, I wanted it to make it short and fast play sessions, so it doesn't get too boring, as there's no other game mechanics in there, like unlockables or boosters.
It makes me happy to hear that enjoyed it that much, I have to say I've kept my eye on yours as it looks cool as F, and it's even more awesome it's now playable in browser, I was putting off playing it until I got time to download bunch of games in one go, but will get on reviewing it now :)
Again, thanks for playing!