unlock desert level by scoring 60 points or more on field level

unlock space level by scoring 60 points or more on desert level

score 100 points or more on desert level

unlock meadow level by scoring 60 points or more in space level

score 100 points or more on space level

unlock dunes level by scoring 60 points or more on meadow level

score 100 points or more on meadow level

unlock cosmos level by scoring 60 points or more on dunes level

score 100 points or more on dunes level

score 100 points or more on cosmos level

kill 3 larger tough enemies in 1 level