In the downloads right? Usually I'm on windows and I can do that, but how do u insert the sprites into the game?
Okay this is going to be the last reply I give, so I'm going to be as specific as possible. At the bottom of your screen, on the taskbar, on the left, is a search bar. Type %localappdata% into that search bar and press enter. This will open the local appdata folder. In the local appdata folder, assuming you have saved at least once, there will be a folder labeled Spacethumper. This is the folder you have to put the sprites in, NOT the folder called Spacethumper in the downloads. The only things that should be in the correct Spacethumper folder before you put the sprites in are the settings save data and the game save data. Once again, the folder labeled Spacethumper in the local appdata folder, and NOT anywhere else. Not in downloads, not in any other folder, just the one in the local appdata folder. If the instructions I gave are not getting you into your local appdata folder, please google how to open the local appdata folder.