Decent TD
Though I find it futile to add basically the same game again, with only a few adjustments, it's still a great game. This "plus" version made game more enjoyable than the first release.
Achievements and upgrade system makes game really enjoyable, however I doubt if there's anyone using Multi Fire, Freeze, or poison towers, or even fast towers! Basically game cuts to getting enough money to start with super tower and from now on, you only build super towers 'till the end of the game. Too bad, 'cause this game has potential.
Also, some AoE towers would be nice (except for the bombs). And "upgrade towers", eg. increasing speed of towers in their area of effect.
More types of enemies would be nice too. Maybe with certain immunities?
Big plus for author for listening to reviews and implying them in his flash!