Level 77 can be a bit tough due to the distance that lemonades must cover till they reach one of the exit points on the bottom of the right part of the field.
Portals with blue lighting are ‘enter portals’, while portals with yellow lighting are ‘exit portals’. Try to ensure the lemonade pieces don’t end up in the far-right column — it will likely make them go the long way through the portals directly in the middle.
To beat the level, make bigger matches and auto-matches. Don’t forget that while you have to collect 5 lemonades, only 2 of them can be present on the field at the same time.