As a huge fan of retro arcade games like Frogger, Space Invaders, Breakout, etc., I'm thinking about designing an arcade-esque game in VR.
I think something similar to Puzzle Bobble would be very fun in VR. The player is in control of a cannon and there is a wall of colorful blocks you must destroy before it reaches you.
What makes it different from the original game is that the wall is in 3D space, meaning you're not just breaking the wall from the bottom up, you have to break it from front to back as well.
There is also a possibility of obtaining power-ups as well to help players progress. Power-ups are there to help you destroy blocks regardless of color. They could range from bombs that destroy multiple blocks or a color-picker item that changes all the same colored block to a specific color. These power ups are going to randomly spawn within the wall and players have to aim their cannon at it in order to get the power-up. The power-ups are either passive or active; they activate once the player obtains it or they need to be activated by having the player interact with it. For example, the player can pick up a bow and arrow type of power-up. When used, the bow and arrow can destroy a line of blocks through the wall. The player has to use his controller to in order to use this particular power-up.
Power-ups would also be very interesting if this game becomes multiplayer. In a 1v1 scenario, the players will be in adjacent rooms with their own cannon. By clearing blocks, a player can send blocks over to their opponent's side. Power-ups can be used for themselves or against the opponent. Power-ups that are to be used against the opponent actually has to be tossed into the opponent's room. For example, if Player 1 picks up a smoke bomb, he has to toss it into Player 2's room to hinder his vision.
For my first prototype, I will create a simple room with a wall of blocks on one end and a cannon on the other.