Looks interesting and I would love to see an optimized build as the performance and low frame rate is what is really holding this back. Also the wheely animation seems to be locked at like 10fps so it increases the overall sluggish/low fps impression.
Cant tell what exactly is going on. The CPU is idle but the GPU is peaked out at 100%. I noticed some motion blur so maybe you should check the post processing settings (its just a wild guess).