Hi there, thanks for trying out our prototype!
Yes it's normally supposed to be played with an Xbox or PS4 controller, the keyboard controls are locked for a french keyboard (so instead of WASD, it's ZQSD).
Otherwise some important mechanics are :
1. You can lifeleech dead enemies or prayers (to regain health (the little circle feedback appears when you can))
2. To break the door at the end, you have to use your special attacks (you did one at the beginning of your video not on purpose), but they remove a part of your health once used
3. You can't jump
Sorry that it wasn't clear enough, but thanks again for trying!