Thanks for the feedback! The way respawn points work (or at least should work) is they should teleport you to the last safe spot if you're hit, and to the beginning of the level if your live count goes below 1. I found a way to cheese it though in one level after I uploaded it. The fact that the key stays with you if you're hit (and not dead) is intentional, I thought that losing the key everytime you get hit would be a bit frustrating.
Yes, the visual cues are needed, that's true, I'll definitely add them later - also with a native build and some minor improvements.
Thanks again for the feedback, I really appreciate that, and I hope the overall experience was pleasant!