It wasn't too bad. The main problem with the game wasn't anything about the functioning, but the design.
Trial and error (having to continually guess which path was safe), coupled with long respawn time (because you have to wait for the death animation and the "you died" words), plus the need to switch from keyboard to mouse and back again (to click the level), equals very frustrated player. In fact, the trial-and-error part of the game wouldn't be so bad if the respawn time was faster.
I know that "this was just a test", but just try to keep it in mind for next time. You can fix the above by:
(just some ideas)
-Expanding the view; allow the player to see where each path leads, or at least more of each path.
-Get rid of the death animation, or put a death animation in the level and just respawn at the beginning. You might allow a certain key take the player back to the level select screen.
-Allow the player to choose levels using the keyboard. Most people don't like having to constantly move their hands from the keyboard to the mouse because it breaks the illusion of being in the game.