maybe use some other objects and don't use so many bouncepads at the left, maybe try to make it so that the rockets follow the player a little bit instead of you just plowing by.

I might not be a expert but I think it is bad to have rows or lines of traps or launchpads.

it's easiest to have a relatively open tileset without a lot in the middle, and to place all the enemies you are going to use before starting the DDA. You shouldn't make DDAs like action maps unless you really know what you're doing, because it's a lot harder to make them impressive. You should place all the enemies at the beginning because otherwise, placing more enemies could affect the lag time for enemy firing, causing the DDA to get messed up. Also, make sure each enemy is placed in such a way so that the ninja will have enemies firing all around, in such a way so that there isn't any time when an enemy isn't firing or a place where an enemy isn't firing from. From there, just place the ninja, and just dodge enemies (try not to block them, and if rockets are bunching up, find some way to separate them or get them destroyed) until you run out of space. Don't ever run away from the action, and it should be a good DDA. Note that this isn't the only way to make a good DDA, and that not everybody thinks that a DDA made like this is good, but it's the way I make DDAs.
Also, it pays off to get yourself familiar with the various means of propulsion. This [metanet.2.forumer.com] guide explains each type of propulsion.

just try to have the ninja dodging the enemies instead of just moving past them. the enemies hardly did anything.
I'm not saying you have to do something really complex, but at least have a few enemies that do something.
still not that bad for a first.

oh crap forgot I had a new account.. look at nicnac14's dda's then.. they arent as good as others but they are okay...

lame, it was practically a dda, you just had to fall into it. It was fun, but way too easy. oh it was a dda, just read the description but I'll leave what I wrote because the dda wasn't that great, the path was practically there, the guy just had to fall into it. there were no close calls except for the pretty close closecall with the thwumps and that was about it. the tiles were bad but made it more interesting than the original ddas. the enemies were useless, the only ones that even god close to hitting, let alone firing at all, were the lasers, and those don't move for like 30 seconds. it may be your first dda, and about 10th of maps overall, but it's not good, so 2/5 for effort. watch more dda's for advice on making good dda's.