It's true that PNGs are bigger when compressed, you can strip it to some size but you can do a comparsion yourself.
My way is to use MoleBox binding BMPs in, that results smaller and faster executable, for PNGs you need a buffer to decompress as pixmap, they cost the same in ram and it's only personal flavor to choose from.
My way is to use MoleBox binding BMPs in, that results smaller and faster executable, for PNGs you need a buffer to decompress as pixmap, they cost the same in ram and it's only personal flavor to choose from.