Needs level 10 upgrades, some enemies to be less rare, maybe a "Burn" chance, damages over 2 Seconds, 4 bullets worth of damage per hit, a "+50% Damage" upgrade, a "Shield" every 10 (-0.5) Seconds, a "Powerup" +8% chance upgrade, etc.
About the other comment, a weapon that 1-Tracks as the Homing Missile 2-Is a High Energy Laser 3 Frags and Explosion on hitting 4 Freezes and Burns with any hit 5 Pierces through enemies with all attacks. 6-Has Meteor damage 7-Enemies crash into others for Base HP Damage and half with Explosion.
There are many types of ants and bugs, this lacks variety, River Ants, Wasps, Grasshopper, Mantis, Centipede, Giant and Acid Shooting Scarabs, Mice, etc
Hard Mode: Sniper +Damage, Bazooka +Special top corner, Sniper +Damage Both Snipers +Range, Shot Gun +Speed Damage Special Reload, More Shot Gun and Sniper Range +3 Damage +3. Shot Gun can deal up to 1080 Damage per shot with 25 Reload when maxed, DON'T upgrade Range, or only once.
Why Slingshot and Sniper haven't special upgrade?
Slingshot: 15 Stun, causes 10% Speed, +Stun time
Sniper: Headshot, x3 Damage x2 Reload when active +Damage
Shotgun: Range reduces Spread so distance between pellets at limit range doesn't increase