Right in the action from the start !
I really like how you structured the game without a single menu, everything is done by moving the character around, even the upgrades where you go to little stands to buy things it's really cleverly implemented :)
Gameplay is fun, the bullet deflecting mechanic works really well, i'd just say that prior to upgrades the cooldown feels reaaally long o_o and that it can be hard to judge your sword's range to deflect some stuff without getting hit.
However i enjoyed very much the amount of strategies you offer with the upgrades and the ability to swap swords once purchased is a nice touch as some weapons feel more suited to certain fights than others.
Overall quite solid already with just a few things to iron out.
Well done :)