A hidden DevMode inside Scrap Garden's code allows you to skip levels without completing them. You can also restart the level and go to the previous level. This will be helpful in practicing specific levels.
Update:
I made a little update to this file. In this update, you can restart your progress in the main menu by hitting F9 on your keyboard. This opens the reset progress menu, so you need to press yes. Also, by hitting F10, your graphics will be set to low. Moving in the menu is now faster too. You know that when you go to the main menu, you need to wait like 4 seconds before you can do anything on the menu. Now you can move instantaneously in the menu! These modifications save you much time if you are speedrunning the game!
Here are the controls:
F1 = Previous Level
F2 = Next Level
R = Restart level (If you play with a mouse and keyboard, it might be a bit challenging not to press the R key while running, but I will probably update this to another key sometime...)
F9 = Reset progress (Main menu)
F10 = Set graphics to low (Main menu)
Here is the download link for the file:
https://drive.google.com/file/d/13sqnemXCVAsBNEJAKFWWs3qzE3zdqNQe/view?usp=sharing
(Chrome might detect it as a virus, but trust me, it's not! This is the same file from the game! Chrome detects almost every .dll file as a virus.)
Installing:
Go to "\Program Files (x86)\Steam\steamapps\common\Scrap Garden\scrap-garden_Data\Managed" or to the folder where the game is currently installed and there "scrap-garden_Data\Managed". Now make a copy of the existing Assembly-CSharp.dll (or rename it to something) and put the downloaded Assembly-CSharp.dll into the Managed folder.
That's it! Now, it should work normally with the addition of a DevMode. Ensure you have the older patch of the game, or else the downloaded Assembly-CSharp.dll will crash the game on startup.
The DevMode doesn't add any other features or benefits, so you can speedrun with that file. Of course, using the functions of the DevMode while speedrunning is prohibited! Only F9 and F10 in the menu are allowed.