Finished 100% of the game... or did you?

Win 10 peaks.

Get the "Über Skull" time on one level.

Set your mouse on fire!

Worship the Satan.

Complete one Heliku.

Return all your beers.

Best of the best.

Finish one zone in Speedrun mode.

Speedrun all levels without dying!

Perform eight rituals.

Run 666m in the Endless Mode.

Master of all four powers.

Be alive longer than 6 minutes.

Play SEUM more than 66 hours.

Jump 666 times.

Get killed by everything.

Retry 666 times.

Shoot fireball 666 times.

Just keep swimming.

Set ballerina score on one level, and be fabulous.

Perform head-banging.

Perform Butt First on one level.

Finish level in exactly 6.6 seconds.