Here is the full list of all 14 Spectraball achievements.
Complete the Sky Ruins Stage
Reach a speed of 100 mph
Clear every stage in order with no fallouts
Complete the Tropical Isles Stage
Complete the Volcanic Crater Stage
Survive for 60 seconds in Laser Jump
Complete the Snowy Peaks Stage
Complete the Space Construct Stage
Survive for 100 seconds in the Arena
Complete the Barren Desert Stage
Complete the Towering Mountain Stage
Survive for 100 seconds in Crate Chaos
Pull off 7 seconds of air time
Complete the Training Facility