Interesting game!
I enjoyed the fast movement letting me zip around the levels collecting loot.
The combat however, I feel was very unintuitive. I kind of understand it now as the last gem/focus being set to either heal or attack but I have absolutely no idea how i'd tell what the other ones did. I pretty much just set it to whatever gems i'd collected most recently and hoped for the best and then just left it there until they ran out, which seemed to do the trick?
I was also not really sure what to the objective was until I randomly got stuck between the boss enemy and a wall and then found out the enemy with a red glow has to be killed to move on. After getting that down I didn't find it to be any worth to fight enemies and they were pretty easy to avoid since they rotated/moved very slowly.
I feel with a bit more polish and a better explanation this could be really good! I'm guessing the different gems could do different abilities but the presentation doesnt really make that clear, at one point the enemy threw some "zzz"'s at me, so I assume I slept it somehow? Maybe some kind of description in the inventory to show what attributes each gem adds would go a long way.
also probably worth noting this game was HAMMERING my GPU for some reason, like using 88% capacity of my 1080ti, not really sure what could be causing that as usually godot games run fine.