This music carried the game. I was ready to squash any bugs to this battle theme music!
Keep working on the project : ) Could use a score mechanic and even enemy kill count tracker since those this game's purpose is to defend the lanes and kill enemies. I would even say, a survival clock that also reads how long you survived the game for, or for each lane, a time track that says how long you were able to defend each lane before it was over run it for.
The enemies could be aligned better to drive right into the lane it is in front of, unless you have an intention to let the bug randomly pick a lane as it sometime appears like it could be going to a right or left lane, because the bug is cruising down the middle on between two servers.
Consider even adding other enemies, maybe one that goes faster, or even one that if you collide with it, it stuns you. Maybe an enemy that can shoot projectiles down the lane and stun you for a moment, putting more pressure on needing to rush to defend other lanes if enemies are on the way if you get stunned.
Keep up your work and efforts!!