Frogger SMS demo 0.4 | Color palette update and some bug fixes

[@125scratch2]

i know the resolution is limited, but i'm not sure how much i like not having a middle section between the road and the river, where you can rest and wait for a turtle to jump on without worrying about cars (though you're not completely safe there when the snakes come out) edit: looks like 224px mode will make the midsection possible

[@agent_framerate]

I'm sure the next version will have more changes and updates to the gameplay.