Loved the concept of the game!!!
The graphics are simple and very nice, and the music and SFX are very good! They matched very well with each other. Also, the music is very catchy! Suited well for a puzzle game like this.
I found the gameplay idea amazing, specially when you have to ride on the drill-missile. The puzzles are easy to solve at the beggining and it's really nice to be learning new mechanics while going through the stages.
Liked a lot the way that the tutorials were shown. Also, letting the player test the buttons in the main menu was an excellent idea.
The movement and inputs are really good (I played with the arrow keys instead of WASD). I just felt a little uncomfortable with the acceleration/desacceleration in the movement. Since sometimes I needed to do some precise jumps, it gave me some trouble.
Also, I felt injusticed in the stage 6 with the transparent wooden blocks. I didn't though that they're on stage, and I've got smashed by the rocks next to them in non-transparent woods.
But it's an amazing game, I really had a lot of fun with it, and would play more levels! Congratulations for the game!!! =D