I enjoyed playing this overall, but have two feedbacks about how I played it
1) having the tank storages only visible on their own tab felt cumbersome, so one of the first things I did was force the tab0 element to always display and modify its render function to update no matter what tab was active (this made the tank storages pinned to the top no matter what tab I was on) and I feel like that improved the experience a lot for me. Part of what made it feel extra cumbersome in this game is that water, your first currency, constantly goes down, so a few times I clicked the upgrade tab and saw myself become unable to afford something in real time for not switching tabs fast enough
2) like in most games with a "you can click to make it go up" feature, I felt obliged to use an autoclick/autofire on my mouse (or hold down the enter key) instead of manually click. because of the variance in how people approach clicker mechanics like this its hard to know how close my experience with the game balance was to what you intended