Secondary Attack - Githubissues

I've had some ideas for what could be used as a secondary attack. Since the primary is hitscan, this one should be projectile based.

Any of the below by selecting upgrades at the start?
A gun that can be upgraded to shoot faster, have extra projectiles, size + knockback, and go in a wavy pattern.
A boomerang you can throw which will attempt to come back to you. Similar to the ball, but with longer distances and damage not based on velocity.
A melee attack which knocks back enemies and deals damage. Upgrades increase speed, knockback and a chance to cause explosions on kill.

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