The risk inside a good day gives Biernacki’s “Up & Down” its pulse. The Kraków songwriter and producer places a close vocal over piano, delicate percussion, bass and electronic detail, then lets the pressure collect rather than explode.

This is polished alt-pop with a melancholic streak, built for the listener who knows that relief can sometimes make the mind start looking for the next thing to break.

As his first single under his own name, “Up & Down” introduces Biernacki with a 3:22 statement that turns unease into momentum.

Biernacki is Rafał Biernacki, the Kraków-based songwriter and producer who previously fronted progressive band Disperse through three albums and international touring.

He has also released two albums as Undefy. Here, he writes, produces and performs everything himself, issuing the record through his imprint, UNDEFY Records.

It puts the lyric and voice close enough for the record’s worry to feel immediate.

The title captures a mood familiar to anyone who has reread a warm message and started inventing trouble between the lines. Biernacki’s concern is not heartbreak alone, nor triumph alone.

It is the uneasy space where happiness feels fragile because it has arrived. His central request, “Hold me close, through the fall and through the climb… can’t survive on just one side,” gives the single its emotional centre.

It asks for companionship across fluctuation, not a clean answer.

“Up & Down” makes its entrance with solo piano and gulls in the background. A delicate kick and rim arrive with bass, allowing the electronic pulse to form gradually.

The first chorus turns up just before the minute mark, while a riser and two seconds of near-silence prepare the pre-chorus that follows.

That use of space helps the track move with a steady pull. Each new element feels placed to tighten the feeling rather than to chase spectacle.

The vocal is kept forward in the mix, a choice that makes the words the record’s main point of contact. Biernacki’s delivery is reflective and contained.

He does not perform the anxiety as a grand drama. He holds it close, letting the arrangement do the lifting around him. The build in the final minute provides the promised payoff, but its force comes from patience.

The song grows without suddenly raising its voice, which leaves its emotional tension intact.

There is an appealing clarity to the record’s construction. At 117 BPM, it maintains a light physical movement while keeping its focus inward.

Piano keeps the song grounded, percussion adds forward motion, and the electronic current gives the arrangement an alt-pop finish.

For listeners drawn to Lauv, Mansionair or Bayonne, the reference points may feel familiar, though Biernacki uses them in service of a more restless emotional question.

The new music appeal of “Up & Down” lies in that refusal to force an easy uplift. Its title tracks the rise and settling of the arrangement, but also the habit of expecting a happy moment to reverse.

Biernacki treats that habit with care. He gives it rhythm, room and a human voice, then resists turning it into a simple lesson.

That restraint makes this first Biernacki single an inviting entry point for alt-pop listeners who prefer feeling over excess.

Paweł Gorczyca’s additional mixing and co-mastering supports the record’s focused finish, while Biernacki’s own writing, production, performance, mixing and mastering keep its identity coherent.

“Up & Down” leaves a clear invitation: stay with the uncertainty long enough to hear how much hope it is already carrying.