The game's enemies could be better looking... but by far out of nearly all unity games, this is the best! 4/5 because of glitches and such, but i have high hopes for this game when its finally finished :D
If you cannot progress after stop sign- Restart the game and let it load an extra minute. EVEN if it says its done wait 1 minute before clicking the start button after its done loading. IT WILL HELP YOU. + if this help so others can see!!!!
Powerup guide: Blue collects all sprites(the green spheres or any other non-red sphere near you) Yellow makes you invincible from red spheres for a short time, and purple collects green spheres and destroys the red spheres, turning them into tons of green sprites.