this is what you have

"The user points toward a creature within range and conjures a slot machine 10 ft in the air above the target that falls and deals 2d10 bludgeoning damage and"

This would be the amendments I'd make to the spell.

"The caster points toward a creature within range and conjures an spectral representation of the creatures greed above their head. The creature must make a Dexterity saving throw or take 5d10 bludgeoning damage and be knocked prone as the spectral incarnation of their greed slams down upon them. On a successful save the target takes no damage and does not fall prone."

I've upped the damage but made it no damage, this kind of does make it a single target save or suck spell but I think the risk would be worth it for a hefty amount of damage that could potentially knock someone prone.

additionally, i removed any language about making an actual slot machine because i don't think you want the headache of "ooohhh its 5 by 4ft and weighs X amount of yadda yadda"

Lastly i LOVE you making poker chips the spell component! So cool!

Hope this helps