Leadwerks Game Launcher lets you play a variety of creative, experimental, and just plain wacky mini-games made with Leadwerks Game Engine. Fly a spaceship through an asteroid field, play a round of miniature golf, or ride a lawn mower while dodging killer cows. It's free and there's a constant supply of new things to try.
With Steam Workshop integration, you can talk directly to the developers and give your feedback for new ideas to be incorporated into their games. Start a discussion and let the devs know what you liked about their game, what can be improved, and any new ideas you have to add to their game. Your feedback will help them design their game and create something new and unique.
Leadwerks Game Launcher is available now as an Early Access title free on Steam.
Looks like a powerful development tool.