Try placing a rocket where paths meet, so you can have less enemies cover more ground, and there will be more action. You can also try placing N in a more open spot so players don't feel too cramped at the start. If you wanna go the extra mile, figure out paths players would take, and place mines where they would fall (or whatever) if they were to mess up. Don't make them too hard to get by, unless your making a mine jumper.

Also, the gold patterns could be a little bit smaller so players dont have to pass over it multiple times to get it all, which in some cases, can be anoying and can really effect how good the gameplay is.

This is very good for a 27th map. You could go back and look at mine, it wasn't nearly as good. Check out the top rated maps qualities every once in a while, interpret some of their ideas into your maps until your good enough to create your own if you ever have map maker's block. Just don't overdue it.