If you work on this some more, I suggest to add some challenge to it. I don't see how it is possible to lose at the current version. The tongue is pretty nice.
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you lose only if your ruby gets stolen by the flies. it is very easy until 800 score at which point they start to spawn every half of a second and it is very hard especially since you cant put ruby back in its place. a post-jam version is currently in development which addresses this slow climb in difficulity and common bugs, complete with sounds. also a new enemy type on the way. I can promise you it is something you will want to play