If you want to play Scratchnapped then the project you want is: http://scratch.mit.edu/projects/10118230/. This project is a remix. credit to griffpatch. Cursor keys - Move cat Space + Move mouse - to pan screen. Trying to fix the debug mode. There is code for it in the latest version of scratchnapped, but it is non-functional...
I added 7 complete levels ! Update: I have started to partially-enable debug mode. the problems are that the blocks, once created, do not clip properly until the level is saved, and also that only a small amount of objects can be placed. Update: Temporarily replaced the newer version of Blocks with the older version.