This was quite fun =D
I really had fun playing this, the graphics are sweet and gladly there is a mute button. The difficulty level was hard but fair and not too over/underpowered. Loved the combination in the use of bow skills and spells which you had to time quite good to not fail. The fire bow was kinda overpowered but i think without the splash effect the last two levels would have been horrible anyways :p
The only thing really annoyed me was the lack of options in "skilling":
you could add options like aim (arrow flighs straighter rather then in a curve with each level), or add the "speed" not only as item but as skillable attribute aswell and maybe some other stuff you can think off. Same goes for magic, i mean it was great there were 4 different types but i hardly got the meteor before the game ended and i didnt even skill any other magic onto level 2. That leads me to the biggest problem or dissappointment T_T 13 waves of opponents: way to less! i barely needed 20 minutes to finish just when i noticed how much fun this could be it just-> bam ended ^^ maybe divide it into story mode and survival mode, you could give the story mode 13 days again maybe add some extra content like videos or "bosses". the survival would just be infinite number of waves until your wall goes doooown =D
nevertheless a great game i had fun playing, too short though!
PS: srsly people? "QQ i cant shot the one at the bottom" -> move with wasd, you lords xD
PSS: maybe you should just add a introduction so even stupid people can play this without problems :p