I'm going to dump some weapon concepts here real quick. They're currently not configured or reformatted for 3d gameplay.
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Blaster Bomb (B:078 C:217) is Hyper Bomb on steroids; dump up to 3 at a time and their detonations are long-lasting and über-powerfull
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Computer Arm (B:243 C:196) causes your character’s Buster to de-pixelate and reshape into a buster that rapid fires fast-traveling long beams and has a high ammo count
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Draco Saber (B:227 C:106) is a sword that shoots an energy wave towards the edge of the screen that accelerates as it travels and can be charged to have the wave take the shape of a dragon.
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Force Field (B:249 C:041) sends a wave of physic energy that travels across the screen (resembling a black field with blocky grid-lines traveling through it); charge it for an even bigger field that travels faster and wider.
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Glamour Gemstone (B:251 C:017) lets you shoot homing gemstones trailed by smaller gemstones. If they don't have a target to head for they'll orbit around you, and then when a target appears they'll head for it. If the enemy has a shield or barrier, the gemstone will orbit them until they cancel their shield, from there they'll dive into the enemy/boss and damage them. And you can also have up to three gemstones orbiting around you, waiting for targets.
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Hive Option (B:112 C:160) summons three humanoid-dragonfly people that circle you. Upon shooting your own buster, they’ll shoot theirs as well.
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Morph Body (B:240 C:102) lets you do one of three different actions depending on how you attack: Aim up, down, or straight and you’ll morph into one of three different forms. One is a giant sphere that you can control to steamroll through enemies, one transforms your lower legs into engines (complete with the sides of your feet sprouting wheels) and enable you to dash through the stage, and the last causes your legs to morph into springs and launch you super-high (in addition to being able to crush things below you).
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Paradox (B:005 C:86) lets you freeze time for as long as ammo remains, followed by consuming large chunks of ammo to distort time and space to damage and destroy foes on-screen. Combining Time Stopper and Gravity Hold into one
This pic should give an idea of the colors: