Obby Maker

You build the jump that almost breaks you - that's the loop Obby Maker runs on. Place a block too far apart and you're the one who has to make the leap, so every course you design doubles as a challenge you'll have to beat yourself. That's the trick that keeps you opening the editor for one more tweak.

Whalebox's 3D sandbox hands you real level-editor tools: drop platforms, string together impossible gaps, and shape an obby from scratch instead of just running someone else's course. If you've spent time in Building Games or lived inside parkour Minecraft servers, the muscle memory transfers fast.

Once your course exists, the fun doubles back on itself - build, then play, then rebuild the bit that made you rage-quit. It's a solid pick if you liked testing your reflexes in something like Deadly Descent, but here you get to be the one setting the trap.

It runs free in the browser on desktop or mobile, no download, so there's nothing between you and your next terrible, wonderful jump.

Design an obstacle course using the level editor's building tools, then play through it yourself to see if your own jumps are actually beatable.

Place platforms and obstacles to build your course, then switch to play mode and navigate the parkour you've created using standard movement and jump controls.

Start with wider gaps while you're testing layout, then tighten the jumps once you know the course flows. Building an obby you can actually finish is harder than it sounds - test often.