Awesome animations and some nice background music. The artstyle was also great. A funny addition would be, if the robot's eyes look in the direction of the mouse in the main menu.
Now on to the bad. It is really annoying that you get reset to the beginning each time you die. Also, the jump pictured below is very hard to pull off, because the character can only jump if he is grounded (you should check if he is grounded or was grounded 0.2 seconds ago).
Then we get to this part. C'mon guys, how I can anyone get across?