Kill 4000 enemies.
Kill 4250 enemies.
Kill 4500 enemies.
Kill 4750 enemies.
Kill 5000 enemies.
Beat stage 5.
Beat stage 4.
Kill 3750 enemies.
Score more than 50,000 points in a single run.
Kill 3500 enemies.
Beat stage 3.
Collect 125 upgrades.
Kill 3250 enemies.
Kill 3000 enemies.
Kill 2750 enemies.
Kill 2500 enemies.
Collect 50 upgrades.
Beat stage 2.
Kill 1000 enemies.
Beat stage 1.
Collect 5 upgrades.
Kill 100 enemies.