Please add a [Spells] building and system to justify the extra price.
This is literally no different from the handheld version of the game and costs more, for absolutely no reason. You kind of owe it to your customers to add -something- to the game, which is why I suggest a magic system.
You get access to a spell room, which lets you buy and upgrade various spells. Matching wand tiles in game can have a chance at enabling you to use a spell you have unlocked or generate mana for you to use, with spells activated by pressing 1-9.
Examples are: Freeze (Stun enemy), Burn (DoT enemy), Polymorph (Turn into a monster temporarily, rod tiles vanish for the duriation of the spell) and Harvest (instantly break all Wood and Stone tiles on screen).
Additionally, you could give the player a method to upgrade their home rather than simply opening doors. Upgrading the bed and adding paintings to the walls or other decorative furniture items you either get through upgrading 'Aesthetics' somewhere or simply getting them by matching 5+ backpacks or using 5+ keys on chests.
Just add -something-.