Thanks for the feedback mate! Lack of sleep was absolutely worth it for the polish and to capture the vibe. I would've even slept less to work on the balancing a little bit more if I could've but I think I'm happy where the game's at.
I'll be forwarding your thoughts about that last bonus level to the guy who designed it, I think he will be very amused/pleased >:)
Joking aside hope the balance of the rest of the levels was on point, we for sure could've better prepared the player for that final challenge