I would like to see some extremely difficult optional boss...10k hp :D Other than that, 50/50 awards, all rewards, and 25/25 golds. 4/5 rating due to me being too pro for AI
People need to learn to appreciate the fact that not all games are meant to have meaning and be "in depth". Just because a game doesn't present a story line doesn't mean it should have to be any less playable. I give it a solid 4/5 due to not having an extreme difficulty option.
3/5. Art is simple and appealing which is good for those people who don't have the graphics card to run intense flash games smoothly. I like the idea of using your pencil as a weapon, but from what I see the trail the pencil leaves behind is just an effect. I think it would be nice for the trail to maybe to additional damage with the green pencil. Unfortunately, playability hurts the score (call me a hater or w/e, but GTFO if all you are going to do is hate on me.) The first level isn't newbie friendly and can take many tries. Nerfing the final 3 waves a little bit would make the game more playable to non TD players like me. I like how the slopes affect enemy speed, since it makes you think strategically with tower placement.
Overall 3/5, Good game, but not great.