Updated to v0.5

Level 1 has been completely revamped to teach the player the basics of how to play.

Level 2 has been fleshed out to train the player to properly utilize the boost mechanic and includes the addition of spikes an an environmental hazard.

Level 3 has been added to ensure the player knows how to do a short jump and includes simple jumping enemies that can either be avoided, or, in case they can't, be boosted through.