meteor gatling badge is bugged.
make enemy rockets another colo - pink or blue.
lvl 10 frantic mode is bugged: i tried about 20 time with homing missiles - only 126/127 kills (normal mode is ok)
also: i think BLUE enemys must be 4-6$ awarded, not 2. and add some ypgrades like DMG UP or FIRE RATE UP or smth like that, BUT they must be much much cheeper - 15 minutes of playing gave me only ~10000$ - this is INCREDIBLY little!
suggestions:
1) tell us what lvl up is for
2) add progress bar under the hood or in the top of screen
3) add a crosshair, not arrow (or line of sight)
4) upgrades must be 30-40% cheeper
problems:
lags A LOT after 20+ lvl (each second on timer becomes as long as 6 normal)
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normal and frenetic are the same, just the speed changes so you must be able to kill all the enemies =)