Lots of flaws made the game nor really entertaining.

Pros:
- Graphics and musics
- No bugs/glitches
- Simple gameplay
- Appropriate/moderate difficulty (It's strange that most people in the review section say it's either too hard or too easy...)

Cons (long list):
- Lack of defense diversity
- Lack of HOT KEYS
- Boring after a while
- Enemies killed outside the screen (before they enter the game area) will drop money there which can't be collect by the player, thus making the next waves harder. This can be avoided by not placing towers near the entrance...
- Calling waves early does NOT give the player extra resources... which is sad. It would help a lot on last levels.

I like the art style, but when you get into the nitty gritty:
This game lacks strategic depth, it lacks variety, the gameplay is painfully slow even on the "3X," and the only thing that keeps you engaged is gathering coins. There are a dozen other TD games I would play before this one.

Seems maybe a little too inspired by Revenge of the Titans.

I really enjoyed this game. Getting all the medals was a challenge but not impossible. I find nothing wrong with the game except a few minor spelling errors. I would suggest fixing them if there is going to be a sequel.

I notice a lot of people saying that this game is too hard. Here are some tips for making the game easier-

Plant towers where they will cover the most ground.

More towers is better than just a few highly upgraded ones.

Use acid (Poison) towers at the start of where the bad guys spawn this wears them down. Space them out along the road so they get worn down by them so your other towers will be more effective.

Use slower towers. While the bad guys are slowed down your towers will hit them more times, making them easier to kill. Put them next to the acid towers.

Make sure to use cannon towers and speed gun towers in addition to these two towers.

Plant bombs near the end. If you put 3 or 4 bombs near the end these can be a safety in case that one monster gets away.

U Each Enemy One Types On Every Levels? U Final Level Have All Enemy Types