Captain Drexx - 8bit tower defense game

[kilele]

Hi there!!
I'm really interested in your opinion about a tower defense game, anyone is on retrogaming? well this is the first tower defense game for the ZX Spectrum, the 8bit computer from when I was about ten years old.
Would you be so kind as to give your impressions of the game, comments, suggestions ?
This is the game :
http://www.zx.kaniv.net/
And you can play the pc version downloading this package :
http://www.zx.kaniv.net/Captain%20Drexx_pc.zip
You can even vote/comment it as well as other games entered in a contest called retrogamesbattle :
http://retrogamesbattle.com/index.php?lng=eng