I actually really like it! I don't know how to play the game because it's locked, but overall a good editor.
I also have a list of suggestions that I would like implemented
1. Select button. There would be a select button for people to choose whatever blocks/enemies/coins/etc. they what and are allowed to move them wherever they would like.
2. More enemy types. Since the only type is moving any direction, (according to the arrow on the dot) You can add stuff like a circular moving enemy. How it would work is that the person would click a spot which is the center of the circle and then the person would click another spot closer the center point dot, that would be the radius of the circle. The speed option would act the same. Another type is a linear moving enemy. How it would work is that the person would click where it would start. Then, the player would click another spot and that would be the enemies trail. They keep on making a trail until the square/rectangle is connected. Or, if the person doesn't want to make a rectangle, the person could make a custom path for the enemy and can end the path by pressing 'D' on the keyboard.
3. Adding multiple start blocks. Right now, you can only add one and it's styles, but sometimes the space for the start might be too big and we want it to be bigger. So, like the finish block, let us put multiple.
4. Keys that could control different doors. So in the editor, one key controls all doors, but it is possible to add a key and two doors, add a line from the key to one of the doors, and once played, that specific door would open.
That's all I want to cover. I would like to see these ideas implemented to the editor, but if you can't, that's fine. You don't have to do all of them, you can only do one or two if you like. Like I said, I really like the editor, nice work.