For a first-time Unity project, it's quite good. I like the way you designed your puzzles; they were just challenging enough that I felt accomplished upon solving them, but still required me to think a bit. For critique, I wish I could pull boxes as well as push, because if I pushed the box into a corner, I was locked and had to restart. Additionally, it appears that the portal spawns randomly, which meant I had to rely on RNG in my favor and hope that the block I pushed through the portal wasn't against a wall. This prevented me from completing the game. But overall, great work for your first Unity project, and congratulations on submitting
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Thanks for your comment. At first, I tried add portal gun but it broke the game. So I Had to delete the system but I didn't delete teleport system because I didn't have time. Unfortunately ,It caused that bugs in game. In the future, I hope I would become more good at game making. Thanks for your opinions.