Yes, unfortunately very short. It's my first game Jam and the way I did things I really didn't give myself enough time to produce something more substantial. Planning on expanding after the jam. Edited my reply because I misread your comment
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Dont worry about it there are a lot of short games - check out mine it has only three short levels.
I like what you have done so far and the premise of the story is intriguing.
If you continue on it - for me the jump is a little too floaty and if you could add some feedback for the combat that would be really nice
Oh and the paralax is a bit much but others already told you