I didn't play the re-published version (since that would go against the rules of the game jam), so this review is based on what you've published here:
I got to like 300 time, but after the first few levels it's quite repetitive. I love the music/sfx and art style, but the gameplay itself wasn't very compelling to me- the jump felt a bit short and so could be frustrating at times, and i found myself never using the whale at all (i tried him once when i got him and decided that i was doing fine with my personal upgrades). I think it would have been a huge improvement just to see a few more enemy types- maybe one tank (can't attack but takes a lot of hits) and a fast enemy (also doesn't attack, but you kinda have to chase it around). The enemies that attacked would stun lock me pretty hard at times, but that wouldn't be a problem if there were different types of enemies mixed into each level. Overall, cute idea and good execution. :)

The art style is sooooo cute! The concept is interesting as well, but it feels a little laggy and unresponsive at times (might be the fault of my browser?). I can see this game becoming a great game!

this might be one of my new favorites . . . the sound effects are really cute :))