Glad you liked it! Could you tell me exactly what the error report says? Android will blame any inability to play the game on a bug, even when it's actually because you need more memory or you need to install it from a different method. If it is the generic response, then the solution will be different than if it there some new bug that has appeared. But you can try clearing up space on the device and downloading through the Itch app, if you used the website, or using the website directly if you used the Itch app before.
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I'm not sure what you're looking at, I'm afraid. This is the Itch app that you can try to use to get the demo:
https://itch.io/app