Thanks for this amazing feedback.
It was a grave mistake on my part to remove the spacebar as jump, I should have kept up, w and spacebar as jump so that it suited everyone.
The enemies need a health bar and some good indication that tells the player that they have been hit.
I would try to fix whatever I can once the game jam is over so that anyone playing my game wouldn't face any problems.
Again, Thanks a lot for your feedback! I really appreciate you taking the time to tell me about the things I can improve!