Thanks for your comment, and well, you're right that it ends rather quickly. I was experimenting with that, but I didn't want to make it longer for a jam since there are many games for people to try out quickly.
As for the lives, they are in the top left corner. However, the number of lives is quite large, which was my mistake while testing the game. I was supposed to leave it at 6 lives, but I was in a hurry due to time constraints and didn't notice.