Pretty fun web game! Quite simplistic mechanically but well pushed and polished in terms of graphics and music. If there's ever a 'sequel' it could be fun to have enemies/bosses to fight to add a bit more risk to the situation.
Controls worked well; It was a bit hard for me to get mentally used to switching in and out of the shell when needed, maybe it could have the option to do it with the down arrow instead, That said, it was still satisfying once I finally pulled it off on each of the screens.