Sorry you had some problems with the web export, and thank you for your report!
I'll make a note of it, but HTML builds are tricky to troubleshoot — I had no problem with running it in those browsers myself, so it's most likely an issue with hardware configuration or OpenGL settings in your browser.
Glad you were able to run in the PC build! I wanted to include that for anyone who had issues with the web build. Thanks for playing :)