This is a really cool take on the theme - great graphics and audio too. The only problem I had was learning how to play the game, the pressure is on from the get go which is cool and its pretty clear to see that you need to build things from the side menu, but the tunnel does not to me seem like an obvious item to build right away.
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Thank you for playing! I went back and forth forever on what to explain and what to let players figure out. Ultimately went with "explain controls, but not what to build" though I agree this was a tough obstacle to start the level with. Will spend more time thinking through the tutorial sequence on future projects :)