2D Shooter Tutorial

Your proposed modifications are not very descriptive. In your final submission you need to clearly articulate your changes made so we can grade accordingly. For new levels, each substantially unique level can count as a single modification. Any new power up needs to be described how to get it and how to use it so we can test it when grading, each unique power up can count as a significant modification. New backgrounds can count as significant if you are creating the sprites for them. A complete art theme change using properly creditted assets from elsewhere can count as a single significant modification, but every visual or nearly every visual should be changed to match the new theme.