BIRD-TD

You're a bird guarding its nest — one finger controls it all. Drag to claim territory, lasso to build towers, draw cards to grow your bird. Claim, build, hold the line.

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Inspiration

You're a bird guarding a nest of eggs, playing with one thumb. Everything, including the build, had to fit inside one drag.

What it does

One thumb drives a layered build, deepening stage by stage: Move the hero to lay out territory — the ground you claim becomes the defensive line itself. Drag to choose which tower answers an enemy's type, position, approach, and strength. Drag again to choose how that tower upgrades and combines with the ones around it. Territory shape and terrain compound into a lasting title and effect, folding back into the build. Each stage brings its own growth — the same one gesture keeps meaning something new as a run goes on.

How we built it

The rule we kept: one mechanic pushed deep beats many stacked shallow. Every later system (upgrades, terrain, the verdict titles) plugs into that single claiming act instead of adding a second one.

Challenges we ran into

Tower defense carries a lot of surface area — placement, targeting, upgrade paths, base defense. The hardest part was deciding what to cut so the rest could go deep on one thumb: converging on the fewest mechanics that still felt like real tower defense, not a simplified imitation of one.

Accomplishments that we're proud of

Every action runs through one finger, and a player can still land on a genuinely different build each run — different tower lines, different territory shapes, different answers to the same enemies. The smallest possible input, producing the largest range of experience.

What we learned

BUILD depth doesn't come from any single mechanic. It comes from the matrix where tower lines, terrain, territory shape, and the enemy roster all intersect — the same drag means something different depending on where the other systems currently sit.

What's next

Cross-run progression, hybrid tower lines from mixed claims, and enemy factions that attack territory shape directly.

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