I made this scrolling room (800 x 600 resolution), containing 7 large objects with alpha-channels and didn't have any slowdown. I have a 2x2 GHz, 4 GB RAM Laptop with a crappy graphic card.
The main thing that slows the game down is the size of the objects and whether they have alpha-channels or not.
The main thing that slows the game down is the size of the objects and whether they have alpha-channels or not.
