Nice game! I like the idea of fishing whales in the sky, because why not? :D
One design flaw I've noticed is that while going up, the platform is in the middle of the screen, and lower half becomes essentially useless - personally I would move it a bit lower so that there are more time to react and click on the whales. Also it's not very intuitive that you need to click whales, at first I thought that they need to get caught by my platforms, which was proven to be wrong :D
The game also lacks fast "replay/end current run" function - it takes a while to drop down, and you can't do anything while falling. I wasn't able to find any key which goes back to menu, so the fastest way to restart was to relaunch the game.