Got to level 150, still had 10k hp. Got sick of playing. I would highly suggest some type of goal (or maybe even ending) that gives an incentive to continue.
The first bullet hell game in a LONG time that really gave me a reason to complete it. The music, visuals, upgrades, and patterns were all very well done. Can't wait to see what's next.
I'd love to see a "Speed Up" ability for the engineer. This would allow engineers to speed up the flow of the game (instead of using a weapon) since they're almost exclusively using their towers.
Excellent game - once you get past the x/32 stage the game opens up more and becomes less focused on the short jumps. **SPOILER** In order x/4 small box | x/8 large box | x/16 Legs | x/32 Arms | x/64 Wings (short flight) | x/128 Flighted Beast
For hard badge you just need about 4k on day 1 (spend initial money on fuel first). Buy Radar 3 and fuel tank upgrades (on day 2). On day 2 (with Radar 3) 15k+ should be easy, buy the fuel sucker for infinite fuel (on day 3) and 3 days to mars is a snap.
 "Dungelot"){kind=icon}
 "Mardi Gras Mayhem"){kind=icon}
 "GunBall 2: Emperor Revenge"){kind=icon}
 "Bullet Audyssey"){kind=icon}
 "Flood Runner 3"){kind=icon}
 "Bunny Flags"){kind=icon}
 "Harmony Keeper"){kind=icon}
 "PixEvo - The Fountain"){kind=icon}
 "The Final Death Wish"){kind=icon}
 "Hedgehog Launch 2"){kind=icon}