There are still many issues when I play, but with more work it could result in something really really cool! In my opinion you tried too much to focus on realistic textures and HD, because you could have given on purpose a very nice retro style. I actually do like a lot your screenshots when I see them in small size, because the simple models and the colors remind me of some old japanese games. The pink/purple sky adds a lot to it by giving a jap anime atmosphere, which is a very good thing imo. What I want to say is that your Cool Adventure could look even more COOL with no antialiasing and with a low resolution, by forcing a PS1 or N64 style. I know that nowadays people want 4k 4k 4k, but during a Jam you're free to try many different things, so why not? Games that come to my mind when I see your world are for example Starfox or Sins and Punishment on the Nintendo 64. 
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Well, its always complicated. I see that Brian Victor above is complaining about the low resolution textures in another comment, so as most often, it is a matter of taste. I would personally choose to go for a retro N64 style on purpose, but I played these games in their time, so I have a kind of nostalgia feeling that others will not have. I just think that whatever direction you choose (retro or hd), you have to take it completely and accept that some people will not like it. Add your own touch!