its pretty good for a game made 7 years ago

good

pretty good for a project,keep it up.

good sound.

Like the music, and the graphics are good too.

Nicwe job

this is pretty good

Puh, much to do....

...but you are on a good way! First to say: I dont give that much on the graphics, its good as it is. All other complains are about the menus and such.

*I dont get the little percentage bar at the bottom...
*[Speed up] should be near [new wave] and [autosend]. [Upgrade] and the "tactics button" should be on there own places. And of course the different types of buttons should look different (upgrades, game, menu/help)
*Your tutorial is great, there are one or two typos though.
*Music is ok, but doesnt repeat or repeats wrongly (i.e. when losing the game fast and getting to the main menu you hear it multiple times)
*No other sounds obviously, I'm not sure if this is so b
*The price of an upgrade should be visible directly, not when hoovering over the button.
*The poison tower first seems not to work, but with lvl 4 its getting VERY strong
*The tanks seem overall harder than the other creeps
*I see no existing feature that is too new or making the game to easy or something like that

So far, I guess some others have enough other complains about all this imperfection ;)
I hope you will finsh this!