Nice demo. The controls feel nice and the weapon animation is awesome, especially with that rotating halo that looks super cool. I found it really difficult to survive past the second wave of enemies. Maybe it’s just a skill issue (I suck at FPS games) but it was hard for me to aim properly to the hologram enemies.
It’s a little difficult to understand what’s going on when the enemies and gems are getting closer. Also, it’s not entirely obvious when you get hurt or what is damaging you.
Another thing I would improve is the jump, I don’t know why but I feel like the character would jump much higher in this game. Maybe there is an upgrade that increases the jump height?
Also, what’s up with the upgrades the improve the enemies? That is interesting.
Anyway, I think it has a lot of potential. Visually it looks great. The controls are nice (except for the jump). And the weapon is really cool.