Press the flag 2 times and wait for a while because takes a while to load. >instructions< Use the arrow keys to move spikes are painful. signs tell you which way to go. purple and mushrooms are bouncy. blue is a teleporter and to activate the teleporter you press space while touching it.
Thanks to @Sc20MeteorS8 for the idea for the second world and for the art for the second world. Thanks to @TheLibrary for the scratch blocks art for the third world.