Gravity flip tests the player's timing at flipping the gravity of an alien creature in order to lead it into a goal. The main verb of this game is flipping gravity. The controls of the game are fairly simple and WASD are used in order to move the alien in the corresponding direction. What makes the game unique is how the platforms are not safe areas for the player to land on but are things to avoid. The gravity constantly accelerating the player leads to uncomfortably high speeds where careful timing is needed to make it through small entrances. This is unique from other puzzle games of simply having to navigate through hazards using movement. The movement in gravity flip is very distinct as the feeling of gravity is communicated to the player by the use of acceleration without any further input. However, changing the direction of gravity resets all momentum that the alien is under, which gives the alien the limitation of only being able to move in straight lines. The game’s 5 puzzles are set in increasing order of difficulty and require careful planning of what straight lines the player must take in order to reach the goal. Planning the straight lines is not enough on its own as the player can quickly lose control of how fast the alien is going and mess up the timing of a gravity flip. The player’s control over their own speed is also tested in order to not crash into the platforms. Another way of proceeding through levels is by using fast gravity flips in order to not gain too much speed in any direction. The “jittery” movement created by this is fairly slow and easy to control but must be used carefully as the designer has placed tight openings that jitter moving would crash you into. The 5th level especially punishes jittery movement and I feel like more levels would be a great addition to this game. I tried to avoid using the jittery movement and focused on improving the timing of my gravity flips. Proceeding to another level feels very satisfying as the puzzles are challenging. The gravity flips themselves felt slightly empty/unresponsive for the core mechanic of the game and maybe could have been accompanied by some sound effect or particle effects/animation to signify that a flip in gravity has occurred. It is a minor thing but I feel it could greatly improve the feel of navigating through a level. The main interplay in Gravity Flip is how the alien’s momentum is shifted and what new lines the alien can travel from each position it is in. The player is constantly engaged by the increasing difficulty of puzzles. The first levels are simple in order for the player to get accustomed to how fast the alien moves and the later levels test this skill. The game is a unique concept and I can see it being exceptionally addictive with more levels and more types of hazards.