Use arrow keys to move, there's acceleration so it's a bit harder. Press space if caught in ground.
REMEMBER, THIS IS A TEST, IT IS VERY SHORT. I can add a bit more levels though. the boss is tough, but all levels are possible. (MOST OF THE TIME YOU WON'T SURVIVE IF YOU STAY IN A CORNER) There can never be more than 3 circles at a time for the boss. Thank you @tinydancer9199 for the dog sprite. :)