The animation is a bit lengthy indeed, in the next version I try to tweak that a bit. A hidden feature is that you can longpress to make the die spin even harder :D
The magenta dots are a safetyfeature implemented by your browser (you use Brave or Firefox?). Very long story, but the sumary has to do with protection against fingerprinting strategies websites can use (no worries, mine doesn't). It changes some pixels in the HTML canvas a little bit without the user noticing. Just happens that my game uses one specific value for transparancy. If it's a bit off, it won't become transparent, thus the dots appear ^^" In some previous entries I fixed that issue, because there it was gamebreaking as colissions would get messed up also 😁
Thanks for your feedback!