The Gravity Express game I'm making is a remake of a decades-old PC game. 278 fan-made levels are available online. I completed a project to auto-convert these to the Gravity Express format. The number of levels is overwhelming, so I put a spreadsheet online to crowd-source sifting through them all.
You can help out by testing as many or as little levels as you like. The download link for the test build is in the spreadsheet, which is available here. Any help is appreciated!