Just wanted to say that I added a Lite version of the dev tool without musics and without credits/menu background images (You can of course use your own musics and images). I added it mainly for people with slow internet connection. The Lite version uses about 8 megabytes less than the original, so there is a certain difference. 🙂
Note: The Lite version has got no changes/differences from the original one except for the lack of following music and menu/credits background images.