So each weapon in this game will have an alternative fire. For your basic weapon that's the Big Shot. It is essentially a charge shot but you don't hold to charge. Instead it has a long-ish cooldown and pushes the character around a bit.
I hope folks who have good execution or are speedrunners will be able to take advantage of the push effect since it allows you to manipulate your vertical air speed a bit. Shooting down will pop you upwards slightly, while shooting up will force your downwards.
I won't be designing levels with this in mind too much, but it is fun!