Added new configs, cleaning them slightely.

Previously they were to complicated, especially while defining sprite
location.
Added new assets, removed the old one.

Those assets are in slightly better quality. Some of them are taken from
internet, also default asset format will be png from now on. It should
save a lot of size in repo.
For now scenes are replaced not pushed/poped.

This is however not decided, just for now makes more sense.