Hit space on the horrible titlescreen to start. Arrows to move, X to dash.
Not really finished as you can't do anything. I'm kinda proud of my accomplishments despite it not beeing a game, as I only managed to spend 1 day on it, in a language and framework I never used before(phaser.io and typescript) and a krita with a tablet instead of paint.net and a mouse.
It's just a beginning as you say, but still, sounds like you've come along way in those 24 hours. Phaser is awesome (I used it), so that's definitely worth pursuing in future. I like the kaiju graphics :)
For only a day you managed to make a really cute creature and a nice little dash anim that felt like it had some force behind it. You should totally try and find some time to take the game further :)
At least the creature was cute and well done ^^