Tower Climber is a vertically scrolling platformer. Your dude walks automatically, turning when he touches a wall or the edge of a platform. All you need to do is jump.
There are jewels to collect and monsters to avoid. Also, you can't jump back down to a lower platform - miss a jump and you'll die when you touch the bottom of the screen.
Just don't do what I was doing, and forget that he won't walk straight off a platform. Told you I'm rubbish.
Tower Climber [Skipmore]