Reach room 25
Reach room 50
Reach room 75
Reach room 20 with lava
Reach room 40 with lava
Reach room 60 with lava
Reach room 35 on Hard difficulty and with Lava
Reach room 70 on Hard difficulty and with Lava
Get all letters and use the N.I.N.J.A. Power
Reach room 60 without getting any N.I.N.J.A. letter
Reach room 60 on Hard difficulty and with Lava without getting any NINJA letter