-1 Theme isn't the best, because obviously there's a CactusPK map already, although that map is based on the minecraft cactus and this to me seems more like real cactus which is different (still not great though)
The jumps aren't very good but kind of okay in a way, being because you use the build a lot, but it gets very repetitive with the same jumps, not enough variety at all, just jumping on the same black blocks with a few ladders. Also at some points In can bew confusing on where to go, so you may want to add some signs for help.
The difficulty is like that of an easy/medium with a few hard jumps thrown in every now and then, which ain't very good.
The build is boring but I do like how you used different sizes and shapes of cactus rather than repeatedly the same, its nice, but still plain.