Original card game, I'm not sure I fully understand the rules though !
As mentioned in other comments, some more explanations would be great.
Good job !

This is the first card game I've seen! The mechanic and premise is entertaining, although the explanation of rules could use some refining. The rules are quite confusing at the moment.

Gameplay looks good ! congratulations on a nice game :)

Really cool idea! The game was a bit hard to see for me, but everything worked fine. Really nice concept!

This is a really neat concept! I think this is a creative idea that would be interesting to expand upon. 

For some constructive criticism, I think first and foremost this could use some more clear instructions for the player. I was unsure how the cards behaved, where I was supposed to place them, and how the projectiles would behave. Having some built-in instructions and maybe some sort of legend for how the different card types behave would be a great improvement.

I also had some visual issues playing this in browser. The display was very small and it was a bit difficult for me to see the cards.

All in all I think this is a fun idea at it's core and is a pretty cool prototype for a 3 day jam. Well done!

Cool idea! the icons on the cards made it a little confusing on how things would rebound and I wasn't fully sure what my goal was. But I figured it out well enough I think