new level introducing random
another new level, placing setters on other events
replace one of the new levels
add set player block sooner
Merge pull request #431 from code-dot-org/flappy

Flappy
have layout ignore non-element xml nodes (which includes things like whitespace
Merge pull request #432 from code-dot-org/layout

have layout ignore non-element xml nodes (which includes things like whitespace)