I like this game nice graphics and good gameplay. The only improvement that might work is if it ran faster when you push the forward arrow key as it can be annoying repeating things slowly over and over again.
I really like this game. The only problem I found was after a while it was too easy and i was not dyeing for ages.
Have a look at a game called "Fantasy Zone" for the Game Gear you could get ideas from it to upgrade your game.
Thanks for the suggestion.
As for the difficulty, consuming more enemy clouds increases the difficulty and how much your score increases. Giving you the choice between taking the long safe route or the dangerous quick route to the highscores.
A health bar would be better also the bullets look like they are just flying over the enemy, it would look better if they disappear on impact and you could add a impact image.
And maybe a one player option would be better.
Nice graphics, If all you want to do is maths then its o.k. but if your after a game to play then its a bit boring, maybe you should add more than just mines like army checkpoints.
It's because I feel like I can do a lot better and I don't want to stay on one skill level in terms of development.