Thank you for playing my game and for your comments! :) It's very nice to read that someone has given this much thought when playing my game.
*Warning: This reply contains spoilers below this point*
About the statue puzzle, I understand your thoughts about the misleadingness. Yes, the audio cassette can be interpreted in different ways; that's why I put the two X markings on the floor as hints. You wrote that nothing happened when you placed the two statues on the X markings, but to be precise, there are actually three statues that must be put in place in order to proceed. One of them is already in the correct place when you enter the room and two must be moved on the X markings. However, if you move the third one to some place else, nothing happens if the two others are placed on the X markings. This happened to one of my friends who played the game. But I guess you already figured this out since you finished the game.
I'm curious, how much time did you have left when you completed the final puzzle? I had actually designed even more gameplay into this game after the final puzzle, but given the time limit of this contest this was the best that I could do. I actually created the whole Factory area together with the rest of the island, UV and statue puzzle + endings in one single day. It took me 12-14 hours that day, haha, I should write a blog post about the whole development project. It was also difficult to estimate that how long should I make the game, given the fact that some players get the puzzles done more quickly than others. I'm glad that you still liked the end result! This is my one-month-game, who knows what the game would have been if I'd had two months ;)
And about the lag with the faster car, I didn't experience that with my two computers, but that is absolutely possible. I had originally designed the car to be only slightly faster when upgraded, but the options of RPG Maker always double the speed, you know. Hopefully it didn't hurt your experience too much :)
Thanks again, I'll put your game on my list of games to play as well!