Kill 110 enemies
Kill 120 enemies
Kill 130 enemies
Kill 140 enemies
Kill 150 enemies
Collect 35 hearts
Collect 32 hearts
Collect 29 hearts
Collect 26 hearts
Collect 23 hearts
Collect 20 hearts
Collect 15 hearts
Kill 96 enemies
Beat stage 4
Kill 64 enemies
Collect 10 hearts
Kill 3 bosses
Kill 48 enemies
Kill 2 bosses
Collect 5 hearts
Kill 24 enemies
Kill 1 boss
Beat stage 3
Beat stage 2
Kill 8 enemies
Beat stage 1
Collect a Hat (excluding tutorial)
Collect 1 heart
Complete the tutorial