This is your 3rd or 4th 2 minute dda. All of your dda's used the exact same propulsion, launch pads, and in all of yours people are saying, "Don't use launch pads." I have no idea why your submitting every level you make, and i have no other way of putting this, this map sucks.

im going to put this very very very bluntly

this map is terrible, its a shame to all self respecting dda makers

never submit this many bad maps in one day,
in fact, you shouldnt put more then 2 dda's up in a day, each should take you at least 2 hours, AT LEAST TWO, you should have to watch it so much that you cant bare to watch it ever again because it took you so long to make the timing as perfect as you could
if you want to understand what a dda is about, u can look at mine, that took 2.5 hours, and its not even that good, which in your case wont matter too much
YOU KEEP GETTING THE SAME FEEDBACK, WHY DONT YOU LISTEN TO IT?!?!?!

than your other. Like theninjagame said, you need a new way to get around. And don't put in pointless mines or bounce blocks. It just adds to the loading time and lag. If you need it to keep N going, by all means put it in. Look at other peoples DDAs for propulsion techniques. Heres my level: http://numa.notdot.net/map/20003 I abuse the trap door technique in here. Next map try to add that. (My map has a 4.5 but you can't see it because of the low amount of votes.) So use my map as a quick tutorial if you must.

most ddas do not use launchpads as their prime sources of transportation. that often makes them boring and repetitive, two perfect adjectives i would use to describe this map. try using some other ways to make n move. there's lots out there, and they can really add some spark to your levels.