Started working on a background today, and settled on a game mechanic that seems to be actually fun. The blue squares in the picture will be fish that just got caught, and the white square is the player. The player has to use the arrows to jump on top of the fish that are swinging around on the fishing line above. If they hit the top of the fish, then they get a point and the fish falls off. If they git hit by any other part of the fish (ie not the top), game over because nobody likes getting fishslapped.
Also I am not a very goot pixel artist but I'm doing my best over here. I got tired of drawing about halfway through, which is why it's just green on the bottom.