It is very important to begin level 344 correctly. At the start of the game there are several squid trapped in the granite, and one squid on the right side of the field. Bear in mind that squid can re-appear on the same spot as the one on the side, so you need to keep an eye on that area.
As there is a limited number of squid that can be on the game field at any point, you need to collect the ones that are already present first. Don’t get distracted by golden tiles or other obstacles while getting the squid, you will have time to clear them later. It is quite easy to make power-ups on this level, and once you have enough bombs, you’ll be able to destroy the granite easily!
Once you’ve collected all the squid, focus on clearing out the golden tiles. Make sure you don’t lose any chances of getting more power-ups – they will quickly charge the Lightning and make it much easier to get a squid the moment it appears. Make sure there are no power-ups in the bottom right corner though, they might prevent you from getting a new squid.