But I'd like to give you some constructive criticism here:
1. You put a few too many objects on this map, which causes lag. For example, the huge clusters of mines which couldn't harm you anyway were unnecessary.
2. There were too many chainguns; just delete the middle one, as two makes it hard enough.
3. I know all the doors at the beginning were designed to keep the tracker contained, but it really hinders the player's progress. Also, from what I've seen, people don't like huge lines of doors generally. Try to figure something else out in the future.
4. Try to be more consistent with the tiles in terms of shape; you had circles and triangles and blocks and everything else. It's not that it's bad for gameplay, but a level just looks better when the tiles have a certain theme to them.
Anyway, I know that's a lot; just trying to help. I can tell you put a lot of thought into this map, and seeing as it's your first, I give it a 4/5.

First map

also delete 0^240,NaN! in the level data. It should delete another piece of undeletable and annoying piece of gold.

great map for a first. Two problems, though. One: it's too hard for me! Two: there's two pieces of gold at the top of the screen. All you have to do is delete the part of the level data that has 0^498,NaN! in it. The ting should dissapear.

For a first map, 5/5. First 5 I have given out so far, but it deserves it.