Here is the full list of all 14 Prismatix achievements.
Reach the Purple Horizons stage
Reach the Crimson Aberration stage
Reach the Orange Chromosphere stage
Reach the Black Void stage
Get the maximum amount of health
Get 100 enemy kills
Get 500 enemy kills
Get 2500 enemy kills
Get 20 enemy kills with the shield
Get 100 enemy kills with the shield
Get 500 enemy kills with the shield
Lose the game with 0 points
Lose the game by a light cube while mid-air
Jump very high