Rocci bird and Memory fixes

[bhansconnect]

This adds rocci bird.

It also deals with a major memory bug in the platform.

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Overall, I am happy with it. Though currently it generates really big cartridges that often don't fit in the 64KB limit. Rocci bird for example:

1. Now regenerates ever sprite every frame instead of storing them in the model to help avoid closure capture code explosion. (probably compiler bug)
2. The sprites actually totally reallocate and fill out list every frame a byte a time cause constants don't work correctly. (compiler bug)
3. It must be built with a lower memory size to fit. I use -Dmem-size=8192. (fact of life with tight sizing)
4. Even with that lower memory constraint, it still is too big until I run wasm-opt -Os at which point it is exactly 64KB. (useful extra tool)

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Luckly for debug and development, this all just works (it ignores memory constraints). Also, perf seems relatively unimportant in wasm4 due to how small all the data is.