The graphics, animation, and sound are all pretty good. The controls are pretty smooth, although I wasn't crazy of having to click directly on an enemy in order to attack it. 

The central premise of reacquiring the deck in order to get your magical abilities back is a great way to tie the central mechanic of every Metroidvania game to the theme. 

Note that it was not always clear which parts of the environment were "solid" for the player character to collide with or stand on.

Also, when dying in the boss battle, the Respawn button does not work. The game has to be reloaded.

The intro made me laugh for some reason. I had trouble respawning after the first boss battle but this is a very cool idea that you could definitely work on later.

I think the movement and mechanics area a good base for a game to maybe iterate on, they feel okay, and the idea of using cards could be further explored, there is potential there.

Conceptually- I like what's presented. We have a player that can only attack while stationary, and cards that represent spells and attacks. Something where you move through a deck of cards with each one being a different attack could be cool, but sadly there's not much presented here and an overall lack of polish. 

I do think this is an interesting start! There is a fantastic idea here that can be explored with only a bit more depth of game play. More concise graphics and less bugs would clean up this prototype into something interesting for sure.

I'm not sure what to do after entering castle, seems like unfinished area that doesn't lead anywhere. Right click doesn't seem to do anything, maybe i didn't notice, but there wasn't any dmg on enemy with active health bar.