Very much in the vein of JSW and Monty games, but you can hit your head on platforms which makes space tighter, and enemies turn and stop randomly, preventing flow. The egg jump requires timing practice, and level 1 is too big and you have to go back to the start to clear it, basically playing level 1 three times, since enemies you killed respawn.
This is for fans of 8-bit pixel platformers who want a challenge from the start.