Thank you for the feedback! We also wanted to add more variety to the engine sounds and make them feel more dynamic. Unfortunately, we couldn't find audio assets that we were satisfied with, and we didn't have enough time or experience to implement a more advanced engine sound system during the Game Jam. So we tried our best to make it feel more dynamic by using stereo effects, but we're sorry it still wasn't satisfying. :( We really appreciate you pointing this out. Thanks again for your feedback!