* No different weapons
* Rebound barriers get in the way
* Geoms make reaching a high score not as fulfilling
* Green enemies are more twitchier, combined with the default pea shooter, makes them harder to hit
* The "invincible" enemies (those red ones from before) are now the size of a pea, and are even harder to hit - again, coupled with the pea shooter
* Arena is smaller, no breathing room