It's very on-the-nose as a Mario 1 clone, including featuring edited goomba and pipe sprites. The game suffers from being exclusive to Microcomputers of the time, which means you only have one button, and it's mapped to be the action button, so you have to hit up on the joystick to jump, which yeeeah, doesn't work well. It's recommended you buy a gamepad or joystick that has a second button mapped to 'Up' so you can jump properly, then it becomes a decent platformer for its era.