Here is the full list of all 10 Nova-111 achievements.
Use Exploder to kill multiple enemies
Use spikes to kill 5 enemies in one stage
Kill 2 enemies in a row with infighting
While Time-Stop, push enemy into projectile
Hit two enemies with laser twice in a row
Dash 20 times in one minute
Bump 1000 walls
Spend half an hour in Time-Stop
Beat game without taking damage
Rescue all 111 scientists