Every one of these is better than the last, but still needs something more to make it interesting. The scoreboard seems rather pointless, since it's not that difficult to get the top score. Add more content, with more challenging shots! Keep up the development!
"it sucks and lvls 20-30 are very impossible i couldnt finish them i rated as 1/5 i dont know how it got 4.15 averag."
... because people smarter than you played it?
A very decent tower defense game, just needs a little bit of balancing. People seem to forget that often times, WE'RE the ones playtesting these games. Comments like "this is a bad game" are not helpful at all.
Keep developing this one, work on the balancing, and you may have a decent TD game on your hands here.
Needs work, but it's a great start. Keep developing it, use the helpful suggestions, ignore the useless criticisms. A tutorial mode might be helpful, and definitely some kind of story behind it, and you've got a great game here.