The HTML version build seems to be missing some key features of the game for some reason (you cant turn cards or even select the buffs)? I  recompiled the game for windows, which you can find down below as a download. please use the download as a judgment reference if you are able to. Since the HTML build is sadly unrepresentative of our game

Move: W A S D

Attack: left click

Sprint: shift

Dash/Roll: Spacebar

Moving trough the manhole: Spacebar

Destroy all enemys per level. When no one is left find a manhole . Before the next Level you can pick buffs helping you mostly fight the monsters in the next stage. But be carefull every buff has a trade of you can see by clicking the head in the corner of the card

3 Levels + 1 Boss Level

for ingame help press H

restart game : P

for cheats press M 10x 

Cheats: 

g: godmode

o: walktrough walls

c: extra speed

x: night vision

v: insta kill