Thank you for giving it a try ! (and for the pun) :D
The checkpoint feedback would be pretty easy to implement and useful to the player, I'll definitely add that, thanks for the tip ! As for not being able to push enemies vertically, I think that's the biggest gameplay problem right now and I'll probably address it post jam. I'm thinking of adding an upward and downward kick, hopefully it will fix the issue. For the laser, my placeholder art had a transparent glow at feet level to make it easy to see depth but z order issue made it kind of weird sometimes with the glow being over some characters, so I should make it on another sprite to make it of low z order and I though I could get away without it in the final art, I guess I was wrong ^o^
Thank you for the valuable feedback and thank you for playing :D