Hahah this is so fun. What a great idea and I would never look at this asset pack and be like "yeah, this is perfect for a Mad Max style truck battle in the desert."
A few quirks I noticed -- for me my truck's bullets were "behind" the truck in terms of order in the layer, which made it tricky to see where I was shooting sometimes. Also, you can go reaaallly far into the distance which is cool but I'm also not sure if it made things too challenging to actually hit enemies. I'm 50-50 on it.
Loved the addition of jumps and the fact that enemies would go flying off of the jumps as well. Would've been cool to have another enemy type and maybe even a boss battle? Honestly I would play this as a full game. It's great. Awesome work!