2D Shooter Project

Please be more descriptive with your proposed modifications. If you created new art, and its different art for each level, this is acceptable. If you used existing assets and just placed them in the levels, this is not enough. Your second modification is not significant enough.

Creating new art for each level would count as multiple modifications. For example, creating a new ship sprite, or enemy sprite would each be one modification so long as its new and clear effort was shown.