You seem to have two very conflicting wishes here: 1) To have fun 2) To write a cross-platform web-base app with good HTML canvas inter-op ... If you really w

You seem to have two very conflicting wishes here: 1) To have fun 2) To write a cross-platform web-base app with good HTML canvas inter-op ... If you really want to deliver this cross-platform app, then it seems that's going to be more work than fun, although no doubt good tool/framework choice can help minimize the headaches. For a fun project it seems better to avoid all of the things that you already know are going to make it not fun! My current fun project is writing a compiler to run on an old 8-bit system (initially targeting en emulator) ... 99% useless, but fun, and I get to choose whether to implement the bits that are stupidity on behalf of the language spec, or extend the language to make it better, etc, etc - no practical considerations forcing requirements on me, since it is purely for fun.