Tick once, not twice, per game loop

[joewreschnig]

For compatibility with MicroPython this is done between tick and draw, i.e. the loop is draw/tick, draw/tick, etc. rather than tick/draw, tick/draw, etc.

[Gadgetoid]

Yikes, good catch. I'll have to merge this right before a release so that it can be documented somewhere since anyone currently relying on ticks for logic pacing will have something of a surprise.

[Gadgetoid]

Thank you 🎉