Not a bad first game with an interesting addition to the typical platformer.
The fact that you could stick to some walls, which normally is seen as a beginner bug, actually made the last level really fun to play, since you could walljump. Not sure if you were planning for this :)
One small bug I noticed was that you can spam the jump button and the jump sound is being played. That should only happen when the player is actually jumping.
When it comes to audio and graphics there is big potential for improvements, but for a first game in a week it was alright!
Also I beat most levels with what I am naming the "instant longneck-monkey jump" for which you in rapid succession spawn the giraffe and monkey at your position to make a long jump into the finish :D
Good game.