DashBoy is an action platformer and considered the sequel to RGBOY. It doesn't continue the "story" or gameplay mechanics from RGBOY but it does have a similar style with small levels built around your main mechanic.
This game isn't perfectly designed but I learned a lot about easing the player into a difficult game while making it.
Screenshots (Click image for full view):
Dash with 'Z'. Jump with 'X'. Move with the arrow keys. Fullscreen 'F4'. Screenshot 'F9'.
Created by: Me. Additional help: Kevin Nielsen.