Cool splashing feel, the sprite really matches its sound effects. Nice concept of gems to improve towers. It would be nice if we could move them around to change the strategy
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Thanks for playing!
I did consider your gem removal and swapping idea, but decided I wanted the decisions with gems to be a bit more permanent. In the game concept, the gemstones would "physically" alter the turrets structure (thus irreversible), but I didn't get the turret sprites finished, so it's less apparent.
I do intend to add a turret selling mechanic that refunds most of the cost of the turret and gemstones.