This is neat! I'd like a visualization line thing that shows what my previous attempt path was so I could adjust my next attempt. Also maybe some randomness Mosa Lina style or like picking your pieces from a toolbox with each piece having a point value with a cap on what you can select.

This is pretty fun. Most of the levels were easy for me, except for two;  The second level for some reason and the first level that had the locked carrot. On the second level, I kept wanting to put a sticker where the sticker inventory was and it frustrated me that I couldn't move the inventory or minimize it temporarily. The first level with the locked carrot took me way longer than I care to admit to figure out, and once I did I felt stupid for not figuring it out earlier. 

Overall, really nice job.

The game is incredibly buggy for me: the first few times, I found that clicking the fullscreen arrows in the lower right caused the game to (permanently, until reloading the page) lose focus; clicking on it did nothing.  Then, by ignoring the arrows, I was able to click on the "play" button on the level select screen, which caused it to start flickering between level-select and title screens.  Now, when I reload the page and click "run game", it's just black.

I suspect this is all details of Unity and not really a deep-seated flaw in the game, which means it's hopefully easy to clear up!