Thanks for trying it out!
The water tower level should have been introduced later into the game, that is for sure (in the initial version that was a starting level :D)
I can promise after that level there are some simpler ones but of course later there are some harder levels as well ;)
I am glad that even though you got frustrated you got an urgue to maybe trying beating it! And I really hope you do! (there is a save system so you won't have to start from the begining ;)
*Spoiler alert!*
There are people already speedruning the game :D
https://www.youtube.com/watch?v=HwK0X2QMmpE