Improve demo page

[kmkzt]

No description provided.

[codecov]

Codecov Report

Merging #265 into master will not change coverage.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##           master     #265   +/-   ##
=======================================
  Coverage   59.79%   59.79%           
=======================================
  Files          20       20           
  Lines         893      893           
  Branches      168      168           
=======================================
  Hits          534      534           
  Misses        240      240           
  Partials      119      119           

Impacted Files	Coverage Δ
packages/img-trace/src/imgloader.ts	0.00% <0.00%> (ø)

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