<pre>
flood2:
RRUDRRULURULLLDDLDW  ==> broken
RRUDRRULURULLLDDLDL  ==> safe escape

if air==0 && reach_open_lifting is the same timing, it is safe.
</pre>

<pre>
flood2:
UUURWWWWWWWWWWWWWWWWWWRWWWWWW ==> -4 broken
UUURWWWWWWWWWWWWWWWWWWRWWWWWR ==> 21 broken

if air==0 && get_lamdba is the same timing, you get the lambda.
</pre>

TODO:
get lambda vs fall rock