INIT routine for most bounce sprites. Mainly used to allow bounce sprites to collect a coin directly above them, though the feature is unfinished and the coin's replacement tile ends up being a solid block instead of empty. Changing $0290ED to [AD] will disable this.
$029330 identifies which block on page 0 can be collected this way. Keep in mind that this is independent of the acts like setting and therefore support for other tiles has to be implemented manually.
