Get past the 3rd wave of skeletons, and avoid being knocked back into the void.
There are leaders, minions, and assassins. Leaders are invincible, assassins have swords with knockback 20 (so be careful). Please make sure to kill all skeletons on the past level before advancing to the next.

Additional Notes

Falling into the void should despawn all skeletons before you respawn -- if it doesn't, then switch onto peaceful for a sec. If you somehow die by a method other than void (no idea how, the skeleton hits deal no damage) then do the same.

Would appreciate someone who is willing to skin the mini-game! (please say so in the project comments).

123outeme is going to help me with the aesthetics -- on Friday I'll be able to update it.