Negative Cash?!?! So if I loose a level I actually go into the red and then cannot upgrade and therefor improve my chances for success? Lame!

Dudz. Utter crap. Between the music overlapping, or just completely losing its sense of rhythm, when restarting and the fact that after a few shots you can no longer fire the weapon.

Poor programming; too many glitches that leave you stuck in empty space.

There is a bug that after the enemy waves the menu wont open.
Not really new but still nice