I couldn't get past the first tutorial level.

Good tutorial and good idea

Cool idea and a cool game. Would be great if the text in the tutorial would fit in the screen.

Really simple graphics but pretty good.

Good idea, but bit buggy, and performance is not the best(I mean fps), but I liked it.

Having troubles on MacOS. Maybe it's just me :
admins-MacBook-Pro:Downloads admin$ java -version
java version "1.7.0_45"
Java(TM) SE Runtime Environment (build 1.7.0_45-b18)
Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)

admins-MacBook-Pro:Downloads admin$ java Into\ the\ Earth.jar
Error: Could not find or load main class Into the Earth.jar

Simple and elegant, great job!

as one java programmer to another I must say well done only using the JRE is a huge accomplishment although the collision is a little wonky at times love the game good job

I found the controls and collision detection to be somewhat dodgy; however, the puzzle ideas are interesting. I think there's something in here that could be developed further.

It's a little buggy but using only the JRE seems to be hard, so good job!

Wouldn't start on OSX Mavericks

Huh, the left click doesn't seem to work for me. (Linux, OpenJDK)

I just see an empty window on OSX

It's pretty good, though the controls were a bit hard to get used to.

It ran very slow for me, and the controls were unresponsive. It looked interesting, but it was too frustrating to use to get anywhere.

Nice ideas but the control issues hampered my enjoyment somewhat

The game mechanics idea is nice, but technically you can learn a lot more.
In lvl 4 I was really happy about the object pusher '^^

Hmm... colisions seems little buggy. They're many places where I can't perform jump.
Also it seems like it doesn't matter if I jump from ground level, or while standing on box, I always reach the same point. It was very iritating to pass that box-creating button from 1st lvl.

Also it's running very, very slow :(

You accelerate very slow.

The controls and collisions in this game make it almost unplayable for me. I really tried but just basic movement is really bad and frustrating. Sorry. I would work on improving the movement input and the issues with picking up/dropping off boxes as they get stuck in everything and then the player sticks to the boxes.

So this game has potential but a few issues were too frustrating to get past. First the player character's movement was all sorts of off. Going from stationary to moving left or right took way longer than it should've. Jumping causing the player's left or right movement to stop felt off. Putting boxes near the first level's counter became difficult after the 4th. I feel like a little more polish and I would have enjoyed this a lot more.

The tutorial level was challenging. Controlling movements were clunky, though I like the game title.

Interesting idea. Controls are really awkward. Movement generally should not be dependent on the OS keyboard button hold, which is what keyPressed() relies on. Better is to use flags.