Really good prototype of a game.
Very cool and thoughtout ideas for enemies and hazards Spiky Ice shooter (was my favourite), falling lava/rock debries, exploding sun-like sphere. VFX were on point.
Adding some sfx would defenietly help the project but you know it ;)
For me player movement was too slow (but that is a subjective opinion).
I am glad you did not reset the collected crystals after a death)
Would love to see those extra 2 levels that you did not have time to finish.
And sound ofc :D
Entry with a lot of potential.
Good job :D