This was a decent game! Im unfamiliar with Sokoban but I can get the concept quite simply. I do have my criticisms though.
For one, it feels like the timer aspect is a bit arbitrary? Like, instead of the game being built around the timer you instead have a timer if that makes sense. As well, the upgrade system is a bit flawed. I noticed as you go through the game, one item you need incredibly badly after level 4 is the magnet. However, if you purchase no coin multipliers by the level you need the item, even resetting your upgrades wont give you much more than the magnet, leaving you without time to complete the level. I dont think many would make this mistake, but its still an oversight I fear. Also, the music stopped playing about once I hit level 5....
Other than that though, I had a good time with it! Its a decent puzzle game that had my brain going, and I cant imagine the Magnet nor teleporter are a part of the original Sokoban, and they were fun additions that added extra layers to each puzzle.