Cute. Fun. Various weapons and armors.

As for now, I have melee, ranged, magic, and magic-melee (default maaic until mana drained). All armors is a suit, no armor combination. Each weapon or armor may have different special perk(s).
Shop items are random and reset every level completed. The best strategy is buy all before unlocking next level, or at least buy all stackable items. Farm coins can be done by playing any previous level, but latest one may give more coins.
Many items can be obtained from drops in any level, so I believe all items can be obtained by monster drops or crates. It's also possible that some items drop only in certain level(s) or world.