It might be me, but I do not understand what you’re asking about. Here’s what I got:
- in lvl 1 pickups spawn close to the player at certain intervals
- in lvl 10 pickups spawn how?
Or is this what you’re actually asking about - pure ideas. Perhaps you could explain briefly what the setting is. Otherwise you may end up with some questionable, esoteric, borderline useful ones…
Give us something to work with. What’s the game loop / gameplay like? Is it about item variety?
- top down shooter and we need to replenish health / ammo?
- we’re a SuperHedgehog and pick up rings of gold?
- we’re in a Mario vs Luigi spinoff and ram our head into a cinder block?