Demotivating messages are too fast, especially long ones are hard to read.
Crabchan just scrolls in endlessly, albeit getting slower, let it run for a bit, ruins the Effect. Consider scrolling in and out.
You can fall of the boss Arena, and boss just dissappears after a while, leaving you with nothing to do.
Duck makes surprisngly huge amounts of Sense, acting as a moveable cover.
Upgrades are overpowered, way to many Points.
Cute Soundeffects.