Change a few things
Speaking as a Game Design major, here are a few things you can do to really make this game shine:
1) Replace the lives with an energy bar. It gives the exact same effect as you have now, but people are more used to having a maximum cap (in this case, 8) on energy, not lives.
2) Pick a more accessible basis for the topic. The gameplay itself can be associated with any number of topics but the "keeping your buzz" idea is both overdone and poorly executed in this case.
3) Perhaps add some different game modes:
A mode where the size/shape of the arena changes.
A mode where you can gain some way to remove the "downers"
4) Spruce up the packaging and fix any glitches in the code.
and PLEASE put in a function to mute the music and/or sound.
Thank you for your time
-D.D