When the game loads, do not hit flag, because the engine is not meant to be played by itself.If you want to use this engine, you want to look through the code, drag it to your backpack, then drag it into your game to use it. You may edit some things about the blocks and player, but most of it is important. Take note that when you put the sprites and code into your game, that you change a line of code in the player that says "play) from f to t. I have put a comment there so you can see where it is. You also have to re-create play, and all the other lists with the setting for all sprites, and replace it in all sprites, which is time consuming, but needed because of how scratches backpack works.I have also included (not voluntarily) a gravity script for the player as well. Finally, note that there is some script in the background that you will need to copy as well.
I give credit to my real life friend, @Cheif1511, for helping me through the problems I had while making this Level Save code, and I thank everyone that is going to use it. Please share all of your games in the comments, or if you perfected the engine, also share it in the comments.