Cube Escape Birthday is a puzzle game where you try to find out what's going on at a strange birthday party which seems specially prepared for you. As is typical for games of this genre, you'll have to interact with other characters and elements in the scene and solve various logic puzzles in order to beat the game.
In the room, you'll find lots of different elements to interact with, including your parents and your grandpa. Almost all of the objects in the scene are useful in some way, so you'll have to examine and touch them all. In the scene, you'll also find several items that you can pick up and put in your inventory.
Items in your inventory can be used later on in other parts of the room. For example, early in the game, you can deflate a birthday balloon, fill it with water, put it in the freezer, and then break it and get the ice. What do you need ice for? Well, you'll have to play to find out.
Cube Escape Birthday is an excellent room escape game (which is a subgenre in itself). It puts you to the test with some ingenious puzzles, and you can even interact with several characters, which is pretty unusual for the genre.