Good game, but my only real complaint is the upgrade system. You should make it clear that the upgrades do not stack. One upgrade is +3, the next says +6, but in reality the second upgrade is just an additional +3. Either change the second upgrade to say +3 additional, or say somewhere on the upgrade page that upgrades do not stack.
This is a good game. The main problem I have so far is the equipment is kind of awkward to upgrade/compare. Showing your inventory and allowing inventory to be upgradable in the armory upgrade screen would be VERY helpful.
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