This would have been 5/5 if not for annoying little details. The fact that WASD and arrow keys conflict in my laptop, and there is no way to change the keys. No hint how fast I need to be on each level to get A ranking. Poorly thought out rankings in general: B is too easy, while A is too hard on most levels, and in levels where A is not incredibly hard it is ridiculously easy. Badges or no badges, I ended up giving it 3/5.
Thanx for playing and commenting :) level 1 is now fixed