A nice puzzle game. It has the general idea of box moving puzzles, along with many additions, such as the objective to solve the puzzle to get to the top, avoid obstacles (oil spill), and objects that move across dimensions, teleportation.

The most cons were the keyboard controls and menu gui. It was not automatically indicated which lighted text was the selected option. Thus I thought the game started with the "Exit" option highlighted, because it was lighter. It's easy to distinguish the chosen option when you press ESC in game because there are more than 2 options and the odd colour out will imply the chosen option. But on the menu where its one or the other, its hard. I had to restart the game at first to make a new decision after mistakenly choosing escape.

Additionally, on the web version of the game, pressing escape first took it out of full screen, and then opened the menu. I could not restart the game with keyboard shortcuts such as R. So I could not play in full screen, as I had to esc -> esc -> restart many times. It also would have been preferable if you allowed either arrows of WASD to move, but it's more of an accessibility than a con.

Cons aside, man I did feel like a boss solving some of these puzzles, first mentally and then in practice. And I mean...if only the teleportation device could work on Dr. Ottos xD

The larger levels did add an increasing level of complexity. It's amazing how you added so many levels and variations in the time span. I'll be honest, I eventually began skipping levels because it got too hard xd but I did enjoy the amount of time I spent playing this game :D