boolean can_pass_to_walkable; /* player can pass to empty or walkable tile */
boolean grow_into_diggable; /* amoeba can grow into anything diggable */
+ boolean continuous_snapping; /* repeated snapping without releasing key */
boolean block_snap_field; /* snapping blocks field to show animation */
boolean block_last_field; /* player blocks previous field while moving */
boolean sp_block_last_field; /* player blocks previous field while moving */