yes it is really hard to create lots of levels and also i make the levels 3 hours before the jam is over. i should be more concern about making the levels since it is really important for this type of game. For moving a character i used transform.Translate but i never use rigidbody.velocity before but i'll try to use it later and this is also a good tip for me to make the game better. Thanks for the feedback and the tip from you, Really appreciate it :)