The floorguard and zap drones I have no major complaints about, besides that they were far too easy and slightly bland. All the doors weren't really necessary and the mine-oneway-gold thing on the left isn't good, you could block it with only one mine. Also, the one-ways around the gausses served no real purpose. The thwumps were nice, but the upper-left one was a pain to get past without crashing into those mines. You could take out the mines over the stuff at the end and please don't put stuff under bounceblocks.

But the map plays alright and you haven't randomly mine-spammed everywhere, so I'm going to give you 2.5 rounded up.