Really good looking game here! Quite an elegant use of the 2bits color pallet. The scrolling with the sun looks very nice. I also like that the title screen is part of the actual level.
The gameplay is nice. Even if it's not very pleasant to play with a keyboard, I'm sure that it would be all alright if played on an actual console.
Really great job overall!
Too bad that there is no sound at all, it would really add to the mood of the adventure.
And last complain, I can't clearly see the connection to the theme of the Jam within the game. I suppose that the goal of the character is to grab some gold at the top of the tower or something similar, but I don't feel like this is a really gold-centered game.