Very Pleasing indeed.
A very good game. It was incredibly difficult! I still havent finished it. It's not because it is too hard to stay alive (which is still quite hard!!) it's because it's sooo long! Each wave is really long. I love the upgrade system. I love the style. It is very well thought out. With a fantastic potential of a game, comes a few points of critisism to boost it's grade to 'outstanding.' I think you should lower the prices of some of the upgrades or up the amount of points you get for killing enemies! It would take a good couple of hours to get 500,000 points to get the triple rocket thing! Sort that out and you're on a roll! Also, there are extremely long breaks in the middle of each wave, where no enemy comes on screen for a good few minutes...it wastes a lot of time, and is damaging to the interest factor. It was a good idea to change the colour of the enemy as the levels progress because otherwise you would have lost my interest. It is a fantastic game, and I loved playing it. I will play it again to get to the end if I can! Well done!