Fun level in general, but could do with a bit fewer places where you can green cube through a point of no return and hit a checkpoint with too few blue cubes to actually get through. Even pretty levels get a bit less fun when we have to read your mind over the internet.

Nice level, though I felt like I did some things in an unintended way. All the blue and green cubes make for lots of possibities.

I'm glad you did! I am a big "fan" of alternate routes! :)

I knew it could be done.

I left that in
the fans to the roof.

What a fantastic level! I finally found the secret route - I found the end before I found the beginning, actually. the fan jumps allow you to get on the roof if you jump on the blue cube. I am so impressed! Thanks for moving the save stone so you can open the three cube door. This level has such great replayability! Well done indeed. I also got to the top of the world. :) http://images.akamai.steamusercontent.com/ugc/282971566649729184/36808CC5F0A00EB0CE1EABFB4AB69AC6B0F86E37/

That is the best way to play! Make that player think. :) I'll try again; though I solved it without the three cube door being open.

And I nlike the Idea of working something out, I have played puzzle games before, and when obvious I get bored of it. So I try to make a not hard to work out but takes a bit of time.

Has been changed a bit, resubscribe to notice.

On route one (which I finally figured out), after you get to the three cube door, the save stone is blocking the cube placement. You might want to move it forward. Not sure if that was intentional.

I made it to the end - by the second route! Not sure if it was the secret route or not. I found the second blue cube, got the door open, and I am thoroughly impressed with the level! :)
It is a good idea to make a quick return when you have to get the player back to where they started, and you did a great job of that in the area with the 3 fans that you have to jump over. I love the ability to recollect the blue cubes, and the gameplay is really fun. The architecture is very creative, and you have made excellent use of space. Overall, a really great level! With several different routes, you have excellent replayability, and you definitely make the player think to solve the puzzles.

Here are some things you might consider to improve the level:
Quicker returns in the beginning – loops instead of spurs, or out-and-back
More direction to the player after the first locked door – a path on the floor would be great. I got stuck there.
When it comes to lighting, less is more. Those lights are pretty bright!
The rubble is beautiful, but is a little hard to get over – you might want to make it flatter. I love rubble though!
Visually, the level is pretty busy. I hate to say it, but I think less is more when it comes to level design. I am going to have to restrain myself too when it comes to level decoration in the future because I tend to over-decorate.

It is a wonderful level – very, very fun, and a great thinking level. No hard jumps or difficult challenges, but you have the gameplay really well worked out – especially on route 2. I am going back to try to finish route 1 now! :)

carefully

look carefilly at the Ice window.

I didn't get past the 2 cube door; I couldn't figure out where to get the second cube. The lighting is pretty blinding; you might want to dim the light cubes a little. The architecture is nice, but I wasn't always sure I was going the right way. I'll have to give it another try when I have more time - I'm looking forward to finding the secret route!