This is the game we did in 48h for the Ludum Dare 42 with the theme "Running Out of Space". You can play it at https://danibarca.github.io/LoPetaEntertainment/ or download it for windows from releases.
Use left click to shoot enemies and right click over a tile to reload the gun, removing the tile in the process.
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Daniel Barca
Noa Durán
Tomás Banzas
Hermann Plass