I can see this game has potential, however it does suffer from some oversights (apart from the bug). If you just spam the up and down arrow keys, you can play indefinitely (even with the bug breaking your screen) without any effort at all. A simple solution could be to penalize the player for pressing a direction when there's no duck there, for example by having the hook stay on that side and making the player unable to press any directions for half a second. What confused me on the first couple plays was that after gameover, you're sent to the gacha screen; at that point I hadn't figured out how to play yet and had 0 tickets so it made it annoying to try again. Finally, in the prizes screen, for some reason the cursor goes a bit randomly when you just press right - sometimes it goes down or backwards.
If you flesh out the gameplay some more, you could have a really nice game with a good incentive to keep playing. The gachas are a very good idea!