Bro, it looks like a super stupid game, but damn addictive)

In fact, it turned out to be interesting that the tower defense is mobile. Of course, the sounds are simply gorgeous, most importantly handmade.

I also noticed that it's like in the code you check the number of coins and the cost of upgrades using ">", but you need ">=". But maybe the code is somehow arranged differently.

The sound effects are genius. Maybe I would make the enemies more of a threat, but Its already fun as it is 

Hey cool! haha, I really liked this game, the gameplay is great, very fun, the sound effects and the art are also great, they accompany the gameplay very well. The truth is that it is a very complete game. The only thing I missed was a button to restart if you lose or win, because I had to restart the page to play again. But it is still a great game, congratulations! :D

Man this is great, please make it more clear what to do (without reading the description) because it would be a shame if people quickly try it, don't get it and instantly close it after that. Had so much fun playing this and if it had more content/something to keep playing for I would probably even pay money for this on steam or smth. Great job.

Edit:

Btw I also really love the mix between tower defense and managing fuel while switching tracks. This game deserves a lot more attention, I'll keep playing until I beat it haha

Second edit:

I liked the gameplay here. It preyed all my addiction to constantly level up my stats like other tower defense games and the process of gaining new turrets by jumping to other tracks was innovative since it gave the player something else to do instead of just watch. If you ever plan on working on this game again, I would suggest refining the inventory and management system like maybe just reordering the animals or switching them out. I learned that strategy games, which I feel like this game is aiming for, are often good when they provide free management of assets.

Combining mobile autorunner and tower defense gameplay styles with Noah's ark and trains is such a cool and very unique idea! Great job! :)

(If you continue developing this idea, you could give each animal different attack types. Plus, if you combine two of the same animal on one train car, they could get boosted stats, thus serving as a reference to God's command to fill the ark with two of each animal. You don't have to use these ideas of course, but I just wanted to share some thoughts I had...)