In this game, players can «tip» the creators of the user - generated puzzles with stars, which can be used to buy new parts in the robust level creator. (darkainarts.com)
In that effort we've invited three talented level creators from our community to each create a brand new level. (refract.com)
With those two options, and perhaps some sort of level creator I could see myself still playing this game a few years from now. (jgghgames.com)