Beat Levels 1 - 10 in one session without hitting any spikes (Unlocks when starting Level 11).
Beat Levels 11 - 20 in one session without hitting any spikes (Unlocks when starting Level 21)
Beat Levels 21 - 30 in one session without hitting any spikes (Unlocks when starting Level 31)
Beat Levels 31 - 40 in one session without hitting any spikes (Unlocks when staring level 41).
Beat Levels 41 - 50 in one session without hitting any spikes (Unlocks when starting Level 51).
Beat Levels 51 - 60 in one session without hitting any spikes (Unlocks when starting Level 61)
Beat Levels 61 - 70 in one session wthout hitting any spikes (Unlocks on Level 71).
Beat Levels 71 - 75 without hitting any spikes and view the final screen (must beat 75 last!).
Complete Levels 1-10 in One Session
Complete Levels 11-20 in One Session
Complete Levels 21-30 in One Session
Complete Levels 31-40 in One Session
Complete Levels 41-50 in One Session
Complete Levels 51-60 in One Session
Complete Levels 61-70 in One Session
Complete Levels 71-75 in One Session