I put together a small obstacle course game with a unique twist:
https://www.roblox.com/games/6235346473/DEMO-Achieve
Most levels (starting at level 26) contains medals which can only be earned by completing special challenges, like beating the stage under a time limit or without jumping, give it a try and let me know what you think!
It should only take about 30 minutes to finish the entire game, It’s not too long currently.