Reach checkpoint 8.
Complete the tutorial.
Reach checkpoint 4.
Complete a level.
Pass 4 checkpoints without saving.
Get all the floppy disks in a level.
Pass 8 checkpoints without saving.
Complete a level without saving.
Get all floppy disks for a week.
Complete all levels for a week.
Complete all levels for a month.
Get all floppy disks for a month.