My level

Ship Section (0-20%) - The background is pretty nice. However, the block design is pretty much nonexistant, and the blocks are kind of hard to see. In addition to that, the gameplay is mostly flying straight while moving up and down 1-2 blocks every few seconds. Overall improve foreground and make more interesting/varied gameplay via gravity changes, speed changes, changes in elevation, etc.

Wave Section (21-44%) - The teleport transition gives pretty much 0 time to react before you die. Try to avoid TP transitions, and if you really need to, add a safeguard to give some reaction time. The background is kind of commonplace in a lot of levels, but is still alright. Gameplay is much better here, much more variation and elevation changes. Again though, the block design is pretty much just solid blocks, and again the blocks can be hard to see.

Ship Section (45-67%) - Again the teleport transition is completely unnecessary, but this time there's a safeguard so I guess it's ok. Pretty much the same problem as the first ship. Gameplay was more straight flying and overall pretty dull. Again, foreground and block design needs some work. Try adding pulsing objects and put more than one object into each block.

Robot Section (68-81%) - Much better gameplay. The orbs and gravity changes really helped. Block design was a little better (but not by much), but was still pretty plain. Background was OK. Foreground improved a bunch by adding all those flames, deco objs, etc. Just maybe tone down the flames a little, there's kind of too much now. Only part I disliked was that orb spam at the end. Try to avoid more than 4-5 orbs max in a row, levels with so many orbs in a row usually have bad gameplay.

Ball Section (82-100%) - Again the gameplay is much better than previous sections. The section is really empty though. I'd suggest making some spikes visible and adding some block structures just to make it look a little more filled. Background was pretty generic, but it'll pass.

OVERALL:
Gameplay - 7.5/10 - Not that bad. Main problems with the gameplay was in the ships. Add some gravity changes, and some more diverse obstacles, and you'll do fine. Another problem was that orb spam section. Never do that, it gives people carpals tunnel. xd.
Decoration - 6.5/10 - Again not bad. Some background were kind of unoriginal, but ones like the first one were pretty good, if not a little messy. Main problems were with block design and foreground. Compose your blocks with more than one object, and try to fill up all those blank areas with more obstacles, deco objects, pulsing objects, etc.
Sync - 1.4/2 - Not bad, not great either. Most sync problems were those straight fly ship sections, and just a little bit in the wave.

FINAL SCORE -
21/30 - Decent
Main places you need to work on is ship gameplay, foreground decoration, and block design.