While I already was aware it uses the Stepmania 5 engine, it becomes really obvious upon playing the game. Within the five songs available, the charts don't really make a whole lot of sense. Keeping in mind that this is primarily aimed towards pad players, the hardest charts seem to not know if they want to be straightforward or gimmicky, therefore feel very awkward and falling for the traps of various charts created by others outside of a professional scope. A lot of the gimmicks used seem forced, making this seem more like a demo of Stepmania 5 as a whole rather than Pulsen as a commercial product.
I feel a lack of effort also made the presentation quite... bland. No fancy banner graphics for each individual song to easily point out what song is what and the lack of better backgrounds makes the game lack personality. The Nyancat remix may be the most individual, but a bit more effort could have been used in the other songs.
The song selection is nothing stellar here. No songs pop out as amazing and they seem too generic. This is a personal taste issue though.
The presentation as a whole is consistent, making it stand out as its own entity, but ultimately failing at capturing those that are interested in these games. Many other projects -- most of which are free -- have done miles ahead in terms of overall production compared to this, and the fact that extra songs cost money when the base package doesn't really help define the game surely doesn't help matters.
I cannot rate the first pack of songs as I did not -- and at this point will not -- purchase them. I recognize a few artists in that pack I like, but without knowing the songs I cannot even feel tempted to put forth money towards it.
If you are interested in 4-panel play on your PC or perhaps some other form of play for music games, you should definitely give Stepmania 5 a try and find some custom songs for it. There are thousands, if not millions of simfiles available for instant play. As it stands, Pulsen does nothing to stand out as a commercial product.