Aaaay, thanks for shooting us a message and glad you enjoyed the polish!
The controls issue you are experiencing is interesting. In the current version we have right now, the more stability lowers, the faster the snake moves, which decreases your time to input a directional (creating a potential feel of sluggish controls and a lack of response on directional input). I'm wondering if that could be causing the issue in tandem with something controls-related. Either way, we did tweak those guys for our post-jam update to fix some issues in this current version (e.g., no more speed increase), will say that sluggish controls altogether are not intentional so we'll take another look and get that fixed.
Regardless, appreciate you giving our game a shot and for letting us know about them directional input issues.
- S.