These are my 3 levels. The first is a little basic get to know the world, with the mushroom, spikes, water, and ladders. Level 2 introduces the enemies, and just shows sort of their functionality of where they can be and go. Finally, things are put to the test a little in level 3. Spikes, enemies, platforms(mostly kept in the idea that coins will be coming shortly), to see how well the player can get out alive.