I built a mobile tower defense game solo in Godot and it's on TestFlight now. Free, no ads, no purchases, no account.
The design bets on tower interactions rather than a large roster. Four towers, twelve permanent upgrades. Hex Totem does damage over time and increases damage taken, so it multiplies everything else in range. Amplifier Nodes buff nearby towers and can be built to stack with each other. Rapid Shooter can go rate-focused or mark targets so every other tower hits harder.
The specific thing I want feedback on: my own testing could not distinguish three of the Rapid Shooter upgrades in terms of how far a run got. Either they are genuinely interchangeable and the design needs work, or my testing was too crude. I need people who will run the same map several times with different upgrade choices and tell me whether it felt different.
At the end of each run there is a Send report button. One tap, sends the build and per-wave results, no personal information.
A run takes about ten minutes. iPhone, iOS 16 or later.
https://testflight.apple.com/join/XpQY7W3j
Known gaps: no sound yet, and everything is drawn procedurally so there is no art.