Easy "300" achievement...
	Easy "Touch the Eye!" achievem...
	Various Steam Achievements...

If you make a mistake, intentionally make make two more mistakes under the normal difficulty setting to return to the previous level. Finish it and try again. You can repeat the process ten times and still qualify.

Touch the eye at the main menu.

Successfully complete the listed task to unlock the corresponding achievement.

Achievement	How to unlock
150 Seconds	Complete 5 consecutive levels without any mistakes.
300	Complete 10 consecutive levels without any mistakes.
Easy Rider	Complete the game in normal mode.
Error	Complete 20 consecutive levels without any mistakes.
Hole In One!	Pass a level without taking damage.
Kung Fu Master	Complete the game in nightmare mode.
Moving Target	Complete 5 consecutive non-easy levels with only 1 life remaining)
My Precious	Collect 100 pickups.
Pro Player	Complete the game in hard mode.
Shields Up	Collect 100 shields.
Silence is Golden	Complete 5 levels with sounds and music muted.
Three Times's The Charm	Complete 3 consecutive levels without any mistakes.