The early levels were fun trying to precisely navigate the dangerous spaces.  Moving the player was pretty easy to do and very smooth.  Multiple paths through levels let you pick what you thought was best too.   The screen is very wide, and the character is pretty tall though so traveling vertically was much more dangerous, you didn't have as much time to react because obstacles weren't on screen as long.  This was really apparent on the level that introduced the magnet obstacles, I actually never got past the 2nd magnet above the first, they pull very strong and most of the room is deadly.  I'd suggest start of with an opportunity for the player to learn how to deal with them in a safer environment first, maybe have it be the only deadly thing in the room.  I also noticed on that level that spikes kill you if you touch their corners along the floor, their hit boxes are probably too wide.  Game concept and mechanics are fun, I just feel some balancing would help the overall experience as you progress.