nice effort, but mediocre.
music: background music was relaxing, and might be suitable in adventure games where you have the chance to take a break without pasuing, but did not fit the game very well. supposedly, there should be a lot action involved in this game, all condensed within a short time frame. you should aim to make the overall atmosphere more tense.
gameplay: one thing i liked was the fact that controls were simple, and instructions were clearly stated. players can get involved in the game firaly shrotly. it may be basic, but it is a must in mini-games like this.
some glitches were found in the game. to name one of them, you can actually proceed to the next level by going off-screen to avoid those bacteria. this matters a lot. you should add a barrier along the edges to prevent people from cheating their way through.
game mechaincs was unsatisfactory. there is an issue with the timer. you shouldn't force the players to wait for the timer to run out before allowing us to move on. suggested changes to the system depends on the games' objective. if the sole purpose is to kill all the enemies on screen, timer is redundant. the number of enemies remaining on screen would be irrelevant if players are simply asked to stay alive. you can keep both of them if players are penalised for not killing all enemies within a specified time period.
the game itself is monotonous partly due to the same level of difficulty in each round. levels should be increasingly difficult. i suggest you assign power to each individual enemy. introducing power ups and stronger enemies at the later levels would be nice. a scoring system based on the number of streaks and shorter levels will probably add more replay value to the game.
additional features that may be included: it is hard to associate the game with our body's natural defense mechanism. there is hardly any difference between any space shooter games and this game, which made it uninteresting. try to make it more special by referring to the characteristics of the immue response. introducing different types of antibodies that work only against a specific bacteria is one possible suggestion.
overall, i appreciate your effort in making this game. however, there is still a lot of room for improvement.
