Play your map directly inside the editor to test it without hosting a room.
Tester Mode lets you run the full game loop (physics, collision, death, win condition) directly inside the editor, without hosting a multiplayer room. Click Test Game (▶) button to start, and the editor UI switches to a minimal HUD while the game runs.
When tester mode stops, the map state is fully restored — objects that were moved or affected by gameplay (coins collected, buttons pressed, etc.) are reset.
While testing, keyboard controls match the in-game player controls:
| Key | Action |
|---|---|
| ← / A | Move left |
| → / D | Move right |
| ↑ / W / Space | Jump |
| R | Respawn at spawn point / last checkpoint |
| Escape | Exit tester mode |
While in tester mode, extra tools appear in the toolbar:
| Tool | Description |
|---|---|
| Invincibility | Toggle player invincibility — the player cannot die from spikes or fall damage while this is on. Useful for testing map layout without repeated deaths. |
| Show Touchboxes | Render the spike danger/tip/flat zones and the player hurt touchbox as colored overlays. Useful for debugging spike configuration. Note: when you exit tester mode, touchboxes turn off automatically. The state is remembered the next time you enter tester mode. |
| FPS Counter | Shows current frames per second in the top-right corner. Only visible while in tester mode. |
The camera follows the player smoothly. It is centered on the player and does not scroll past the map's die-line unless the player is falling.