Hi, if you use the ‘platformer character’ - behavior as in case of the platformer example that comes together with Gdevelop you can do exactly what you described.
I understood what you meant friend and I guess you don’t even need to add code. Now if you increase the accelaration of player and decrease the deceleration of player what you want will be in the game like accelaration: 1000 deceleration : 200 but you need to play with the values to make it however you like Can you please inform me about this?