Q Boy is a rather well-made platformer from Sachen, whose titular character bears a noticeable resemblance to Dizzy.
A rather strange easter egg; pressing Select while the game is paused will make it Mario-themed! Aside from making Q Boy look like Mario, several enemies are changed to Goombas and Koopa Troopas.
Level Select/Sound Test
At the title screen, press Select.
Setting the Round to "Game" (found near the end of the options) will take the player to the Special Stage mini-game; then to Stage 1-1.