I found controls to be uncomfortable. It would be better if aiming would be done with mouse and shooting with left mouse button. Also i can't figure out what second sleigh is supposed to give me.
Ability to shoot at bullets to destroy them would also be nice. Also i see no win condition, i have successfully dropped boss health down to zero, yet game did not do anything (Also health bar seems to be going backwards.)
Is there a way to block bullets? I did not see any. Also there is no feedback: when bullets hit me, when i hit the boss. Also music seems to break with no apparent reason.