Awesome level editor! I really like the different blocks that you can use and the demo level you've created was really cool too. I just generally like the idea of a game in which you can create your own level and share it with the world. there are 3 main things I would improve:
* Probably more blocks, such as maybe yellow polygons that are hostages, text blocks, animated blocks and some more colors and so on
* Maybe some music and improved graphics to spice the game a bit up
*I would really like if you could share you level with others by directly uploading it into the game and making everyone able to see it
Well, that's pretty much it. I've had a lot of fun creating... well.. what ever that was xD