The gameplay is fun. I like the tension of weaving through the hordes of enemies as they close in on you, and how if an enemy touches you the enemies you chained together will blow up but not give you any reward.
The music and sound effects are nice, but I noticed that the more kills you chain together, the louder the explosion becomes. This is likely a result of all the explosions playing their sound effects at the same time.
I've experienced this kind of problem in my own games in the past, and the best solution I've found so far is to have all the objects that share that same specific sound effect use a single audio player, and make it so that they will not try to play their sound effect if the audio player is already playing one. Then, if one object is playing it's sound, the others can't play theirs.
I did encounter an issue where, if you put your mouse cursor too close to your character, the character would rotate at odd angles. Also, it would be nice if there was a restart button at the end screen, rather than just forcing the player to quit.
Nice work!