Heart Box

This achievement requires you to finish Levels 191 to 200. Timing is crucial with the hoses. For Level 194, there is a glitch where the dynamite box does not sit completely flat on the platform when you drop it. Instead, a space is present. If that happens, restart the level as that gap between the box and the platform will prevent the box from going under the platform that Robby (or the duck) sits on. Just be careful of that. The dynamite box needs to be under (not directly) so that its blast can send Robby (or the duck) to one of the hoses. Also, the hoses themselves require careful timing. Poor timing can cause Robby or the duck to crash into the saw. You can use the hints for help. In addition, you can look at the walkthrough that the developers did for the levels in this video.