Thank you for all the feedback!! There are a few things already being worked on or are planned to be added featured in your reply.
Bouncing off enemies will be available in the lv3 update.
I plan to add knockback when you're hit.
as for gliding there will be unlockable abilities after every boss! The first one will be a glide ability!
As for checkpoints that wasn't originally planned but would be useful so I'll look into adding one or two per level!
As for the bugs and soft locks areas:
There are likely some other areas where you can get stuck, I'll try to look for them and remove them accordingly.
And for the crowded enemy softlock... I have no clue what's going on there if I'm being honest, but I'll be sure to look into it!
Again thank you so much for your feedback! :D