Many thanks! You mean missing kinda "pressure"?
I guess this is also due to missing Music and SFX. Without: the bonus timer is quickly overseen. You only get an increased bonus, and therefore score, if bricks are matched in a shirt amount of time :)
Viewing post in Stick the Brick jam comments
Yes, the sfx and music could definitely help. I did see the bonus countdown, but somehow it didn't feel very 'real', if that means something? Maybe if you also added some kind of negative effect (e.g. spawning random blocks or similar) that happen in the main game? This might be just me but in these kind of games i always end up focusing fully on the main mechanics and don't pay attention to the HUD :P