It d just be a 3D platformer that happens to feature the character of Tomba. 2 does that well. On the contrary, it's even better. These points can be used to unlock specific boxes around the world. Also, there are simply so many quests and side quests that the game will keep you busy for quite a while.
Some new features add to the gameplay.
A good example is the Flying Squirrel suit that enables you to glide safely to certain areas. You get the suit in the snowy area, but you can backtrack and use it in earlier levels to reach objects that you previously could not. Backtracking through the levels was one of the complaints some had about the original game. This time you can find magic feathers throughout the levels that instantly transport you to any area that you have previously visited. There are plenty of these feathers scattered throughout all the levels, so you will always have a way back and forth to the different areas and objectives.